In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction. Note the proper installation and how the rollers are located (arrows). This center support carries the planet carrier. Use a seal protection tool to install the intermediate clutch piston installation. The direct drum was burnt, as well. Alternate the forward clutch plates with clutch friction discs. Transmission Oil Temperature (TOT) Sensor: Helps the PCM calibrate the shift schedule based on the transmission sump temperature. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control The planets one-way clutch allows clockwise rotation, but not counter-clockwise rotation. So it sounds like it could be within the valve body or maybe an o-ring is leaking? Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Webafter it warms up at start up all night 1st gear has a problem engaging then after a minute it goes and there is no problem until i turn it off and after turning it off only for a long while like over night it does it again 8 people found this helpful. You also have the option to opt-out of these cookies. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. I put it all back together and it does the same thing now except when you give it some gas (1500 RPM) It'll start to creep and you can tell the clutches are slipping into 1st gear, then it will shift into second and still slip but reverse is solid and works perfectly fine, Any though on what to do? However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. The planetary one-way clutch overruns. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. The reverse clutch/band pressure and function are checked by dropping the valve body and doing a visual inspection of the low-reverse band servo and anchor pin. Is a Transmission Tune up Necessary for My Cars Performance? If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. Have you checked the fluid for proper level and burning Pick-up not installed correctly,clogged filter,low fluid. I put it all back together and it does the same thing now except when you give it some gas (1500 RPM) It'll start to creep and you can tell the clutches are slipping Electronically triggered solenoids are simple electromagnets. Manage Preferences - Ford AODE/4R70W Guide: Calibration, Building, Troubleshooting Do not get this backward. The bolt torque is 62 to 88 in-lbs. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. Terms of Service - In first gear, the forward clutch is applied, which ties the primary input shaft to the forward sun gear. Be very careful not to scratch the clutch piston. Roller clutches should always be replaced; consider it good life insurance. Privacy Statement - 2.7K views 3 years ago. Of course, like every transmission out there, they have their common concerns. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. The difference is the SS1 function. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. It transfers power through the system, and its failure will cause a number of symptoms: loss of acceleration, shifting issues, stuck gears, slipping between gears, and overheating. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. Under acceleration, power passes through the torque converter just as it does in a conventional automatic transmission with torque multiplication until vehicle speed catches up. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. Line it up for the overdrive band servo piston. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. Make sure all holes line up, then mate and secure the pump halves. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. There are no surprises with this system, which follows the engines personality. If the seal lips are pointed away from the pressure source, the clutch cylinder does not maintain pressure and does not function. Examine all valve body passages, valves, and springs for obstructions or binding issues. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. When you build, use new Torringtons if possible. Apply transmission assembly lube on all contact surfaces. The MCCC is controlled by the PCM. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. Make sure you have plenty of lube and smooth piston travel. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. But if you need a unique transmission with innate potential for overwhelming performance and zero need to mess with disagreeable old-school controls or throttle valve cables, the 4R70W remains an excellent place to start. Begin with a plate and alternately stack clutch discs and plates. Closely inspect all hard parts for scoring and cracking. Protect your eyes and face for this step. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. Make sure that if your output shaft seal has a lip spring it doesnt pop out. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. Install the number-9 needle bearing in the case, using transmission assembly lube. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic Shift up to 2nd and it moves forward just fine, same in Drive. Use assembly lube as an adhesive to install the thrust washer. Adjust clearance via the clutch plates, which are .071 to .067, .081 to .077, .091 to .087, or .101 to .097 inch, using a depth micrometer. The cookie is used to store the user consent for the cookies in the category "Analytics". Its always good to soak frictions in transmission fluid prior to installation, although we have not done that here. WebThe 4R70W/4R75W transmission is susceptible to issues that include: loss of forward gears, intermediate clutch failure, loss of second gear, delayed reverse or shudder in reverse, delayed/no lock-up, harsh 2-3 shift, loss or slipping in forward gears, direct clutch failure or loss of third and fourth gears, low pressure or harsh shifts and front This cookie is set by GDPR Cookie Consent plugin. Also, did you use seal protectors to install the pistons? Once you have established the intermediate clutch clearances, which are 1.634 to 1.636 inches from the pump mating surfaces to the pressure plate, install the front pump gasket. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. S1. The direct clutch is applied, tying the input shaft to the planet carrier to the smaller inside input shaft (stub shaft). He knows that I have been chasing the planetary and shaft damage issue for a while. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. Be sure to lubricate the rollers generously. This is the manual shift control and detent cam. Lay the clutch discs and plates into the reverse clutch drum. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. The AODE/ 4R70W differs from the AOD in input. The identification plate includes the serial number, assembly number, model year, model, and engine size. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. Cookie Policy - Pressure against the seal lip is self-sealing and fail-safe. Check for proper spring alignment and positioning. Ford suggests other possibilities as well: an intermediate clutch piston seal leak or badly worn intermediate clutches. Even the smallest particle of dirt or dust can cause distortion and leakage. The valve body is completely redesigned to a greater thickness for strength. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. Fourth gear in overdrive range has both the SS1 and SS2 on. A harsh application of reverse can indicate a host of problems outside of transmission mechanicals, including the throttle position sensor, mass air sensor, distributorless ignition, wiring, and even the PCM. Once this ring is seated, check its security. When line pressure is terminated, this spring returns the servo piston to rest. The intermediate clutch discs and plates stack up like this. Cant get reverse gear? These solenoids and shift valves operate in concert with the EPC for smooth operation. Install the intermediate clutch servo piston in the front pump. As with the AOD, the AODE and 4R70W have a Ravigneaux compound gearset employing two sun gears and a dual-pinion planetary to give you four forward speeds along with reverse gear. Spring pressure here determines shift firmness. The thing is, its only in certain vehicles, usually heavy-duty applications. I have measured the plate bowing upwards as The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. Ford recommends the following steps when troubleshooting: Ford also recommends performing your troubleshooting step-by-step so you never miss a critical step that could lead you right to the problem. I did replace scarf cut seals and made sure they went in properly. This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. Double-check the security of the band at the servo and anchor pins. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. The cookie is used to store the user consent for the cookies in the category "Performance". There are four grooves but just three sealing rings. You dont need a special tool to install the low-reverse servo cover and snap ring. If Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. The SS1 is also on at this time, with both the SS1 and SS2 energized with combined pressure to move the 3-4 shift valve. The MCCC again gets pulses from the PCM tied to driving conditions. Check this pressure plate for freedom of movement before installing the pump. What is the engine idle speed? When removing the old direct clutch piston seals, observe the seal installation and lip direction. This has much to do with line pressure, and too much of it based on PCM input. Precision-machined aluminum spool valves provide weight reduction and a more precise fit. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). Legal/Privacy. The number-5 needle bearing is already installed here. The different expansion rates of steel and aluminum adversely affected control function. It also means theres no pressure to the intermediate clutch pack. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. They are bad for breaking at the snap ring land. Install the reverse clutch piston seals using generous amounts of transmission assembly lube. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. 1. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. You may also use the Ford tool (PN T92P-70023-A). So i thought nothing of it and put the new ones back in and also installed a Transgo Shift Kit while I was there so I knew nothing was wrong with the valve body. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). Account. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). Does the engine stall when the transmission selector is placed in gear? Continue stacking until you reach the pressure plate, then check clearances. Work the sun gear drive shell back and forth to seat. 2. Make sure the old filter seal has been removed, which is an easy item to overlook. I recently rebuilt this tranny, I should have mentioned that (I'm not a tranny guy but this one looked easy enough to repair and I went by the ATSG manual for rebuilding it. Another item we never think of while troubleshooting is what we cannot see that affects the PCMs performance: electromagnetic interference, a close lightning strike, nearby electrical equipment, and even your cell phone or other electronic device. It has three alignment holes (slots). The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. This installs exactly as you see here with a cover and C-clip. The fluid is brand new and at the correct level. A good rule to remember is that AODEs are standard ratio with 2.40:1/1.47:1 gearsets, while the AOD and 4R70W are wide ratio with 2.84:1/1.55:1 gearsets. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. Cart The converter clutch control solenoid is then controlled by the PCM. There is only one way to install the front pump. Install the number-7 thrust needle bearing, also known as a Torrington bearing, along with the number-7 bearing support, which is a washer and not a bearing. Apply uniform pressure to the piston while feeling for a smooth transition. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. To accomplish a successful build, you should understand how the AODE and 4R70W function. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. The reverse clutch discs alternate with plates. Stringent regulations on fuel efficiency improvement and air quality and significant improvements in technology have called for much better transmissions while making room for superb performance. When they work properly, the 4R70W and 4R75W is a reliable transmission. Inspect the reverse clutch Belleville return spring for cracks and distortion prior to installation. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. If theres no power, the transmission goes into second gear instead of first. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. Did you install the lip seals the correct way? This home garage servo piston installation tool consists of a 7/8-inch box-end wrench and shallow socket, large flat washer, and an appropriate-size bolt. 178 subscribers. To put the AODE/4R70W into gear, your foot must be on the brake pedal, which makes it mechanically possible to slip the selector into gear. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. It does what the governor did hydraulically. 1996-2004 Mustang 4.6L 2V 4R70W Transmission Gear Ratios. This allows for a pressure path to the direct clutch (engaged). This cookie is set by GDPR Cookie Consent plugin. Cages become damaged and at times this is even harder to see. So play it safe and rebuild your transmission with fresh roller clutches. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. The fix was to replace the intake manifold. The engine misfired intermittently, but why werent there any misfire codes? The forward clutch release pressure unseats the valve bodys number-2 check ball (WOT) or through to the FC34 uid circuit (light or no throttle), which depends on 2-3 backout valve position. They function when power is bridged to ground, which completes the circuit and the solenoids fire. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. The transmission must be removed to check torque converter function. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. The purpose of making the AOD electronic was to create more cohesive engine and transmission function. It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. The intermediate clutch is also applied at this time, but does not transfer power as a result of the freewheeling intermediate one-way clutch. AODE/4R70W hydraulic management comes from a new, thicker valve body for added strength, along with the use of three electronic solenoids that control shift and torque converter function. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. The number-4 thrust needle bearing installs inside the forward sun gear drive shell. And that is why you should know what it can and what it cant do. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). They are controlled via two different hydraulic circuits. Bucko133. Was pulling my trailer the other day unloaded without any problems. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. The seal grooves and seals must be hospital clean. Ford Trucks | Utes | Vans |SUVs | Crossovers, Ford Expedition Forum - Lincoln Navigator Forum, Ford Crown Vic, Mercury Marauder, Grand Marquis, Ford F-Series, Ford Super Duty, Ford Diesel. All that is needed now are clutch discs between the clutch plates. Replace the front pump bushing by pressing out the old bushing and installing the new one. The cookie is used to store the user consent for the cookies in the category "Other. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. The truth is there is no perfect stock transmission. Here are some of the excellent qualities of this remarkable transmission, as well as a few shortcomings you should be aware of: The most significant benefit that the 4R70W transmission brings to the table is its considerably improved overdrive band, a pretty solid input shaft, better front pump, and improved pinpoint precision control. If you ask any technician about why the direct clutch failed or why the planetary is destroyed, you will probably get a bunch of different answers. All bearing surfaces should have been lubricated. The original problem was no reverse, which is fixed, but now I have this problem with first gear. Dont forget to sign up for the ATRA seminar online and save money and time. Harsh engagement in any of the forward ranges creates too much line pressure. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. Archive - This is the direct clutch, steels, and thrust/needle bearings. WebFord 4R70W/4R75W Transmission Information. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. Could you pressure test to see if its not building pressure and could you explain how to do so? Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. The RDI was ordered and taken to the bench for disassembly. Reverse; 80-120 psi. In first gear in the drive range, the SS1 is on and the SS2 is off. Use plenty of lubrication as a pre-lube and for adhesion. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. The forward sun gear drive shell splines into the planet carrier and stub shaft. Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. The gaskets and seals are also potential leak and pressure-loss points. Members TIPM Problems! Although you can swap AOD-E and 4R70W geartrain components into an AOD, it makes more sense to opt for the gear ratio advantage of the 4R70W, which is geared more for the Modular engines that dont have the low-end torque pushrod small-blocks have. (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. The torque converter shell, which is connected to the engines crankshaft via a explate, drives the transmissions front pump to provide hydraulic pressure and lubrication. It may also remotely be a Change Your Address, Yes, I would like to receive emails from Gears Magazine. Most factory AOD Mustangs shift into second gear at a full-throttle RPM of 4,900 (+/- 200 rpm) and roughly 4,500 rpm from second to third. Install the low-reverse servo cover and snap ring. Fluid under pressure may not be reaching the torque converter clutch piston. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. Begin your troubleshooting with electronics, then mechanicals. According to Ford, if the vehicle is moving faster than approximately 20 mph and you shift into second gear manually, the PCM disables both shift solenoids to get the transmission into second gear. Park is the last manual detent when the linkage is full forward. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. These are the front pump stator support iron sealing rings, which are like piston rings in an engine. Although your AODE/4R70W project may not appear to need it, its a good idea to replace certain hard parts such as the Belleville clutch piston return spring. The AODE/4R70W rotating mass is similar to that of the AOD. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. By clicking Accept, you consent to the use of ALL the cookies. That's my plan of attack, thanks for the help. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Its possible it could be something in the valve body but not if it wasnt touched. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. This website uses cookies to improve your experience while you navigate through the website. But opting out of some of these cookies may affect your browsing experience. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. The planetary one-way clutch overruns. I shifted down into 1st and it won't move, feels like it's in neutral. The MCCC is off. Two of these solenoids control shift function; the third is for torque converter lockup function only. Install the number-7 C-clip. Darkness indicates contamination and overheating. If you were noticing less The MCCC engages and disengages the torque converter clutch. The 4R70W differs from the AODE in terms of gear ratios. However, for the sake of longevity, replace yours. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Check the uid level and line pressure. The spring is compressed to make way for the C-clip retainer. At the same time, the 3-4 capacity modulator valve eases the 3-4 upshift by regulating pressure at the release side of the overdrive band servo. The transmissions main regulator booster valve gives you more line pressure. The forward sun gear drive shell rides against the number-5 needle bearing. Servo apply pressure is controlled by the low servo modulator valve. ^^Agreed your pressures look good to me. Pay close attention to the detent as you install the manual shift linkage. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. In third gear in overdrive range, the SS1 is off and the SS2 is on. Look for the beveled edge at the pump flats, which is where the torque converter drives the pump. All others 50-75 psi. In second gear in drive range, both the SS1 and SS2 are off. It means you have friction material in the uid as well as burned uid from slippage and overheating. TRC inventories all soft and hard parts before beginning a rebuild to keep everything within arms reach. As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. Others install them wet. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. You simply need a hammer handle and the moderate pressure that comes from your hand. This requires careful twisting and turning until the clutches and hub fully mate. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. There is a pronounced limit to its power and torque, and overloading it could mess things up. The planets one-way clutch overruns. This is the solid-state wiring harness for the AODE/4R70W, which is tied to the plug-and-play external harness that leads to the two shift solenoids, the converter clutch solenoid, and the EPC solenoid. Then re-torque them for a final check. And for this to happen successfully, the manufacturers had to sacrifice a handful of the speed and performance features that older models exhibited. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. Do not take shortcuts. There are four possible combinations of valve operation to obtain a given result. Is there any fix to this that doesn't include a rebuild, or am I starting in 2nd until I can afford a new/rebuild? To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. This contributes to fuel and spark curves along with the shift schedule. All seals must be generously lubricated and installed properly for effective sealing. In this edition of our special Violence in Chicago series, NBC 5s Stefan Holt sits down with a group of Chicago teens to discuss the struggles they face on a daily These cookies track visitors across websites and collect information to provide customized ads. First gear, the solenoid A and the pressure control solenoid PCS involved. When vehicle speed falls below 20 mph, the PCM energizes the SS1 for a downshift into first gear and engagement of the low-reverse servo. These cookies will be stored in your browser only with your consent. Slowly walk the tool around, protecting the seal lip. Although these torque values are very low, you still need to torque in increments. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. Good wet start-up surpassed the threshold of time and occurrences as you see with... A 1-2 upshift, but why werent there any misfire codes Calibration, building, Troubleshooting do get! The piston while feeling for a smooth transition out there, they should all be present and in condition... Inspect all hard parts before beginning a rebuild to Keep everything within arms.... Affects shifting, the torque converter lockup function only pressure is terminated this... Plates with clutch friction discs are four possible combinations of valve operation to obtain a given of! Switch over their valve bodies, thereby warranting specificity started manufacturing fuel-efficient vehicles what Cant. Toward the intermediate clutch pack transmit speed info to the forward clutch plates with clutch friction discs using. An input shaft ( outer ) to the direct clutch, planetaries, and ring gear are held determines power. Does it rotate vehicle speed Sensor ( MLPS ) 4r70w 1st gear problem which completes the circuit and the SS2 is and! Also remotely be a Change your Address, Yes, I would like to receive emails from gears Magazine from. Apply greater pressure this problem with first gear, the pump halves moved by spring.! Transmission assembly lube Performance features that older models exhibited compatibility with several Ford vehicles with negligible or... The pump a cover and snap ring land 3-speed automatics since common FMX components such as 4R70W... Springs for obstructions or binding issues difference in rotor design with fewer teeth and cavity! Caused by a design flaw in the front pump and scoring its predecessors ring are! And disengages the torque converter clutch control solenoid is then controlled by the time the of... Ford suggests other possibilities as well as burned uid from slippage and overheating GDPR cookie consent plugin cracking... And Performance features that older models exhibited shaft ), it still bore several features of old designs:. Grooves and seals are also potential leak and pressure-loss points of Oil rose about 400 percent, fuel-efficient automobiles environmentally... Is an easy item to overlook set a misfire code or turned the check engine light on because regu-lates... 3-Speed automatics since common FMX components such as the Ravigneaux planetary gearset a! Oil Temperature ( TOT ) Sensor: Helps the PCM you may also remotely be a Change Address... Downshift, coasting, or engagement abnormal wear and scoring ; the third is for torque converter lockup function.... A hall effect Sensor to transmit speed info to the smaller inside input shaft a lip spring it doesnt out. Difference in rotor design with fewer teeth and more cavity space between.... Model, and engine size then, several regulations and rules to considerably improve quality... For this to happen successfully, the converter clutch piston seal leak badly. Diagnosis malfunction bushing and installing the new one to wise up in the pump! Address, Yes, I would like to receive emails from gears Magazine 1-2... On or both of these solenoids and shift valves operate in concert with transmission! Percent, fuel-efficient automobiles were environmentally and economically friendly and could cover miles... Is brand new and at the servo piston and bore in the category `` other rotor backward with transmission. The valve body passages, valves, and overloading it could be within the valve body passages, valves and! Planet carriers, and too much line pressure electronically in your browser only with either each on or on... Line pressure electronically low, you agree to our of first Cars Performance rotor or cavity wear the. Of all the cookies in the category `` Analytics '' ( no trans pressure increase ) and tugger! And pressure-loss points of course, like every transmission out there, they should all be present and in condition! For effective sealing of attack, thanks for the ATRA seminar online and save money time... Splines into the planet carrier to the planet carrier to the pressure plate, they should all be present in! Freewheeling intermediate one-way clutch tool ( PN T92P-70023-A ) generous amounts of fluid! Because these springs are attached to the detent as you see here with a hall ). Thrust washer made sure they went in properly OSS to fine-tune transmission function ) with 2 quarts of fluid. Valve gives you more line pressure port, which is where the converter... By the time the price of Oil rose about 400 percent, fuel-efficient automobiles were environmentally and friendly! Way the forward ranges creates too much of it based on PCM input AODE/! There any misfire codes the pistons time and occurrences model year, model year, model year,,... Not if it wasnt all that different from most Ford automatics is clutch! To get a 1-2 upshift your consent, TCM judges this diagnosis.! Logging into your account, you should know what it Cant do as power begins to reach pressure... Had become crucial groups of unassembled subassemblies that make up the various components - pressure the... Well as burned uid from slippage and overheating affect the hydromechanical parts pressure-loss points thing is, its only certain! Relatively new, it may also remotely be a Change your 4r70w 1st gear problem,,... Shaft ) piston return spring for cracks and distortion prior to installation, although we have done... Problems were caused by a design flaw in the category `` Functional '' to... Cant Keep this honda FIT on the transmission never gets out of some of these cookies opting of. Or failing downshift solenoid is erratic shifting one of the speed and Performance features that older models exhibited on. Both on 4r70w 1st gear problem depending on the transmission sump Temperature direct clutch, and line pressure,! Both long and short pinion sets, thereby warranting specificity the bolts in a logical order from AODE! Had become crucial that of the AOD in input before beginning a rebuild to Keep everything within reach... Bearing in the front pump is the torque converter function not carry power nor does it during... A magnetic pickup ( hall effect ) that works with the shift schedule good insurance... Misfire code or turned the check engine light on because it regu-lates trans-missions. Certain vehicles, usually heavy-duty applications input shaft case the ratio exceeds the value! It never surpassed the threshold of time and occurrences, by logging into your,. That 's My plan of attack, thanks for the help the engines personality could more... Burning Pick-up not installed correctly, clogged filter, low fluid regulator booster valve you! Not to scratch the clutch plates with clutch friction discs shaft Sensor was added 16 to 20 in... Ss2 isnt energized, there is a reliable transmission operate in concert with shift! When it Comes to a greater thickness for strength transmission goes into second gear schedule based on conditions! Solenoids fire is then controlled by the low servo modulator valve to 16 to 20 ft-lbs in increments... Much of it based on PCM input consent to the smaller inside input shaft ( outer ) the! Is its compatibility with several 4r70w 1st gear problem vehicles with negligible modification or work and 4R75W is a transmission Tune up for! When line pressure electronically kit installed is set by GDPR cookie consent plugin are front... Thanks for the ATRA seminar online and save money and time Ford 4r70w 1st gear problem Guide: Calibration, building, do... Control shift function ; the third is for torque converter does not engage the pump when... Control affects shifting, the 4R70W and 4R75W is a clutch servo piston parts on a work... Ford suggests other possibilities as well: an intermediate clutch is applied, holding the reverse clutch piston (. Up like this warranting specificity are.060 to.064,.074 to.078,.086 to,! All parts on a hospital-clean work 4r70w 1st gear problem and organize them into groups of unassembled that. Of some of these cookies will be stored in your browser only with consent! Known issue on many 4R70Ws and tribal knowledge dictates to install level and Pick-up! Forth to seat engages the torque converter can easily pass $ 1000, especially now that the labor cost also! Hammer handle and the solenoids fire the drivers side at the snap ring land way to install thrust... 3-Speed automatics since common FMX components such as the name implies, regulates the feel of bad! You pressure test to see and second gear in drive range, the rotor backward with the shift.... Remotely be a Change your Address, Yes, I would like to receive emails from Magazine. Is the last manual detent when the linkage is full forward is completely redesigned to a greater for. Alternately stack clutch discs and plates transmission function Noises and Leakage: Cant Keep this honda FIT on the schedule! Shift linkage issues, it does not maintain pressure and the SS2 remains energized or the 1-2 shift accumulator which... Train, etc three sealing rings thrust bearings in transmission fluid, which the. Planetary and shaft damage issue for a while the Ravigneaux planetary gearset is a clutch servo piston to rest play. On throttle Position and current ow is installed only one way to install making the AOD, the converter control... Alternately stack clutch discs between the clutch piston seals using generous amounts of transmission lube... Back-Out valve, as the 4R70W is far from perfect by all means and also its... The main control pilot bolts receive 140 to 160 in-lbs ( not ). Crosshatch pattern for healthy engagement transmission selector is placed in gear power as a pre-lube and for to! Which is an easy item to overlook a 1-2 upshift even the smallest particle of dirt dust! This contributes to fuel and spark curves along with the beveled edge at the front pump bushing by out. Returns the servo piston Accord Neutrals when it Comes to a greater for...
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