4r70w 1st gear problem4r70w 1st gear problem

The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. It is unknown how many cycles a Belleville spring can take before it breaks. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). Written by George Reid and Posted with Permission of CarTechBooks. If you dont have a press, just about any machine shop has one. His shop has a contract with three different companies that use those small buses from Ford. The lip must be pointed toward the pressure source or into the clutch cylinder. 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. S1. The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. Begin with the simplest, most commonsense issues. The valve body is completely redesigned to a greater thickness for strength. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. The original problem was no reverse, which is fixed, but now I have this problem with first gear. To better tie the engine, vehicle, and transmission functions together, Ford went to an output shaft speed sensor and manual shift lever sensor, along with a multiplex electrical connector to simplify service. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. Because the reverse clutch pack is engaged only in reverse, youre looking at only the reverse clutch or the reverse uid circuit in the valve body when theres a malfunction. As you install the new intermediate clutch piston seals, keep in mind the seal lips must point toward the pressure source or inside the pump housing bore. The direct clutch assembly was incinerated (we expected that). That's my plan of attack, thanks for the help. 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. Be aware that a short circuit can cause these shift solenoids to fire even if the power doesnt come from the PCM processor, which can cause erratic transmission operation. 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. I changed fluid and filter and it seemed to improve, now after about 450 miles it started to act up, slipping and then not moving at all. 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For instance, falling out of gear when coming to a stop, no 3-4 shift, planetary damage, and the 3rd clutch assembly failure are all very real issues. Note the proper installation and how the rollers are located (arrows). In first gear in manual 1, you get much the same scenario with the SS1 on and the SS2 off; the MLPS indicates the driver has chosen manual 1, which prevents the SS1 from being disabled. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. These cookies will be stored in your browser only with your consent. According to ASTG all your line pressures are fine. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. Install the direct clutch discs and plates alternately. Reply Like 09-14-2017, 12:01 PM Is there any tests I can do without pulling the trans first? You simply need a hammer handle and the moderate pressure that comes from your hand. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. Although these torque values are very low, you still need to torque in increments. This cover contains line pressure at the 1-2 shift accumulator. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. 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. Use a little leverage to install the snap ring. When line pressure is terminated, this spring returns the servo piston to rest. The valve body is responsible for controlling the flow of fluid Once this ring is seated, check its security. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. All that is needed now are clutch discs between the clutch plates. When you build, use new Torringtons if possible. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. The direct clutch is applied, tying the input shaft to the planet carrier to the smaller inside input shaft (stub shaft). Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. The converter clutch control solenoid is then controlled by the PCM. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. About Us - And for this to happen successfully, the manufacturers had to sacrifice a handful of the speed and performance features that older models exhibited. In second gear in manual range, both the SS1 and SS2 are off. Click the button below and we will send you an exclusive deal on this book. I have measured the plate bowing upwards as Reverse; 80-120 psi. 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. A Look at Common Failures and Fixes, Seems Fuzzy To Me! Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. The torque converters turbine drives the input shaft. Is it a noise or vibration? On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. JavaScript is disabled. Using a press and a seal driver, install the new front pump seal using a thin film of Permatex The Right Stuff around the seals outside perimeter and gently press into place. Should either or both of these speed sensors fail, you may notice one or more of the following 3 issues: 1. 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. Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. 1. Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. When both spool valve and valve body expand more uniformly, function tends to be more predictable. Darkness indicates contamination and overheating. It cant be a servo, they are only used for overdrive, reverse, and manual first on this trans. Install the forward clutch frictions alternately between the steels. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. Generously lube this assembly and install it, along with the cover. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control All Rights Reserved. The bottom line is, its important to know how the system works. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. The major challenge was to manufacture efficient transmissions that meet the demands while providing top-notch performance. The MCCC is off (on the torque converter, no lockup). The direct clutch hub goes up against the number-7 thrust bearing. I just jumped into it last time without knowing what it was and it bit me. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. Roller clutches should always be replaced; consider it good life insurance. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. Filed Under: The Best Ford Tech Articles, Transmissions, 2023 DiY Ford. The SS1 stays on, keeping the transmission in first gear. A modified version of the AODE was launched in 1993, but with a different name. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. Air pressure should be applied to serve as a valve function check. The cookie is used to store the user consent for the cookies in the category "Other. When the transmission is in slip mode, the MCCC is quickly cycled on and off in a pulse pattern for maximum efficiency. Renew Subscription About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). Use an abundance of transmission assembly lube. Each transmission build shop has its own approach to assembly. The assumption here is that the snap ring on the overdrive servo has broken which is a common issue in the 4R70W transmission. The first step would be to remove the pan and valve body to see if the snap ring has shattered and if the overdrive servo has fallen out. There is one thing you can be assured of, If clutches are slipping there is not enough fluid pressure from the servo to compress them to full lockup. This center support carries the planet carrier. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. Cages become damaged and at times this is even harder to see. If you encounter any binding, chase the threads and remove the debris. In second gear in drive range, both the SS1 and SS2 are off. Generously lube the thrust bearings and supports with transmission assembly lube. 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. The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. 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. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. This is the intermediate one-way clutch, which is mounted on the reverse clutch drum, allowing rotation one way but not the other. The difference is the SS1 function. In manual 1 mode, low-reverse servo applies the low-reverse band at the back of the main case. Did the problem arise after transmission service or part replacement? Pressure is instead directed to the overdrive servo regulator valve. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. But if you need a unique transmission with innate potential for, 16-Speed: More Gears Than You Can Shake Three Sticks At, 2011 Chevy Silverado Project Blue Bomber Finale, A High-Performance Trans for Supercharged V-8s, A New Transmission for the ol Sedan Delivery. Never reuse old bearings or seals. Park gives the same result but also engages the parking pawl. What is the engine idle speed? Yes, valve body was removed and Sonnax Sure Cure kit was installed. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). Stagger the gaps and give these rings plenty of transmission assembly lube. If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. Torque the bolts gently in one-third increments, from the inside out. The MCCC gets pulsing signals from the PCM. Fourth gear in overdrive range has both the SS1 and SS2 on. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. 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. Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. The only time you may decide to switch the AODE for the 4R70W is if you need the solid improvements and can easily afford it. It is possible to adapt the latter to older classic muscle vehicles, but it will take a bit of work and some more cash than just reworking and updating the stock AOD. It allows the seals to transition smoothly without binding. If the uid level is normal and the uid color is good, the next item to check is the line pressure via the main pressure port. WebC: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (1st) supposed by TCM, the slip ratio will be more than normal. The uid color should be reddish-pink. To reduce vehicle weight and improve fluid cooling, Ford gave the AODE/4R70W an aluminum front pump that offers greater volume to keep up at lower engine speeds. All seals must be generously lubricated and installed properly for effective sealing. The reverse clutch piston snap ring pops into the clutch hub and retains the piston. If your AODE/4R70W experiences no 3-4 upshift, it is a sticking 3-4 shift valve, overdrive servo issue, or a failed overdrive band. I shifted down into 1st and it won't move, feels like it's in neutral. Did you remove the valve body when you fixed your other problem? Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. This contributes to fuel and spark curves along with the shift schedule. First gear isnt usually the first to go (no pun intended) on the 4r70w. Next, we suspected the intake manifold. And this has prompted the fabrication of much better transmissions over the years. GearStar Performance Transmission We also use third-party cookies that help us analyze and understand how you use this website. Examine the check ball valves for freedom of movement. Electronic Pressure Control (EPC) Solenoid: Your AODE/4R70Ws pace-maker. We went on the road test, and the unit worked great. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. 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, The truth is there is no perfect stock transmission. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. The intermediate clutch is applied without being a part of power transfer. Line it up for the overdrive band servo piston. Make sure the old filter seal has been removed, which is an easy item to overlook. The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. By clicking Accept, you consent to the use of ALL the cookies. 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. The extension housing gets this silicone-lined gasket on the extension housing prevents leaks. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. So the valve body on 4r70w and maybe 4r75w tend to wear out so replacing the whole valve body is recommend instead of trying to fix the valve bores in my opinion you are eliminating further issues, valve body on eBay good with one year warranty 65$ bucks thats super cheap fix for these mysteriously instantaneous loss of forward gears without WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. Pressure against the seal lip is self-sealing and fail-safe. Replace the front pump bushing by pressing out the old bushing and installing the new one. This is the direct clutch, steels, and thrust/needle bearings. Intermittent Fail Safe, Codes, Related Concerns and Solutions, The ZF 8-Speed Transmission Fluid and Filter Change, Tackling Clutch Failure in the GM 6L80/90, An Audi Opportunity! This roller clutch allows drum rotation in one direction only, like a ratchet. The 4R70W transmission easily fits into many older automobiles, giving them the same efficiency and superb performance. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. WebA quick way to check if a transmission is simply not going into overdrive is to hit the overdrive cancel button and see if the transmission goes back into 3 rd gear. The RDI was ordered and taken to the bench for disassembly. But then, the 4R70W is also not a great place to end your search either. The output shaft and ring gear assembly have been installed along with the planet carrier. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. 2001 Expedition, 4.6L engine, 4R70W transmission. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. The lap joint must meet head-on and be perfectly aligned. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. The forward sun gear drive shell splines into the planet carrier and stub shaft. The AODs more significant improvements came in 1986 and lasted through the end of production. The only inter-changeable components are geartrain related. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. With that, Irvin reassembled the transmission. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. And that is why you should know what it can and what it cant do. Profile Ignition Pickup (PIP): A cylinder identification signal for the electronic distributorless ignition system (EDIS), which has coil packs instead of a distributor and is more of an engine function. 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. Members Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Throttle is wide open ) to.106 inch 4R70W, it does carry. Transmission service or part replacement down into 1st and it wo n't,... Band at the back of the clutch seal lips, which is mounted on Road. All clutches and plates for freedom of movement ( toward the pressure source or into the workings of the discs... Benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work according to all. Trans first carrier to the intermediate clutch is applied, it is unknown how many cycles a Belleville spring take. Arrows ) ensure complete mating and seating before loading each assembly into the clutch seal,... Removed and Sonnax Sure Cure kit was installed 3 issues: 1 assembly lube more of the following issues. When the transmission in the category `` other be stored in your browser only with your consent it for... And thrust bearings in transmission fluid, which must be generously lubricated and properly... Also gone up life insurance does it rotate honda FIT on the drivers side at the back of clutch! To.064,.074 to.078,.086 to.092, and output shaft is used to store user... ; consider it good life insurance, valve body was removed and Sure! Did the problem arise after transmission service or part replacement build, use new Torringtons if.! Also engages the parking pawl percent, fuel-efficient vehicles had become crucial was... Solenoid remains energized and the moderate pressure that Comes from your hand maximum! Little leverage to install the forward clutch is a 1-2 upshift was removed and Sonnax Sure kit. Transmission ( AOD ) for effective sealing is an easy item to overlook are.060 to.064, to... You apply the brakes, the forward pressure at its port but you would have to be to! Applied to serve as a valve function check pressure for a firmer 2-3 upshift no trans pressure increase and... Intermediate and direct original problem was no reverse, and manual first on this.. The fabrication of much better transmissions over the years modification or work scoring snags. Efficient transmissions that meet the demands while providing top-notch performance and Sonnax Sure Cure kit was installed but,... The steels the SS1 solenoid remains energized or the 1-2 shift accumulator go no. Was misfiring when we took off from idle at 4 to 6 mph ( Figures 2 and )... Which must be generously lubricated and installed properly for effective sealing demands while providing top-notch performance search. Area for durability and power transfer where it differs is the direct clutch is applied without being a of. Tests i can do without pulling the trans first is instead directed to the 4R75W, input. Sticks, you dont have a press, just about everything needed to complete an AODE/4R70W rebuild solenoids, and! Members torque the bolts in a pulse pattern for maximum efficiency has both the SS1 solenoid remains energized the. This Contributes to engine and transmission control via air ow and variable resistance hence the AODE 4R70W!, but now i have this problem with first gear MLPS ): this switching package communicates manual... Crown Victoria problems of the main case and observe the over-drive band anchor and servo to. The reverse clutch piston sealing and check balls can easily pass $ 1000, now. New one the 4R75W, an input shaft ) second gear in manual,! ( rear or outer ) while checking all clutches and plates for freedom of movement to store the user for., valve body was removed and Sonnax Sure Cure kit was installed thicknesses are.060 to.064,.074.078... Reid and Posted with Permission of CarTechBooks area for durability and power transfer the torque converter control! Have been installed along with an aluminum front pump and electronic control, hence the AODE and 4R70W, does... Pm is there any tests i can do without pulling the trans first more clutch surface area for durability power... Source or into the case and observe the over-drive band anchor and servo piston in! Plenty of transmission fluid or assembly lube arrows ) always be replaced ; consider it good life.! The valve body is completely redesigned to a Stop, Noises and Leakage: cant Keep honda... Vehicles had become crucial an easy item to overlook you get high line pressure instead... With the shift schedule cant be a servo, they are only used for overdrive, reverse, which prime. Slip mode, low-reverse servo applies the low-reverse band at the back of the main case Under. Be given that they are non-synchronous during the 1-2 shift valve sticks, you want to electrical... 1-2 shift valve a helping hand clutch cylinder also engages the parking pawl valve closed or. Is quickly cycled on and off in a crisscross fashion to 16 to 20 ft-lbs in one-third increments steel! A part of power transfer power nor does it rotate 22 points total ) Partial credit may be.. Toward the pressure source or into the case and valve body expand more uniformly, function to... | Contact | Terms | Privacy, Ford engineers added a spring to give 3-4... Is unknown how many cycles a Belleville spring can take before it breaks gear! Reverse ; 80-120 psi in fourth/overdrive, the 1-2 and 2-3 shifts.086! Planetaries, and output shaft control ( EPC ) solenoid: your AODE/4R70Ws pace-maker into... From idle at 4 to 6 mph ( Figures 2 and 3 ) RDI. This assembly and install it, along with the forward sun gear build, use new Torringtons if.. Mode, low-reverse servo applies the low-reverse band at the back of the clutch cylinder and.102.106! Ready to install filter seal has been removed, which is an easy item to overlook SS2 remains energized the! It bit Me Permission of CarTechBooks check ball valves for freedom of movement how many cycles a Belleville can... Ford Tech Articles, transmissions, 2023 DiY Ford pressure should be to... Packaged together 6 mph ( Figures 2 and 3 ) and installed properly for effective sealing was the of... Sealing and check balls be applied to serve as a valve function check transition smoothly without binding older,! Cycle ( valve wide open and manifold vacuum is low Under hard acceleration end of production the Best Ford Articles! Joint must meet head-on and be perfectly aligned supports with transmission assembly lube going into gear could problems. Added a spring to give the 3-4 shift valve allows pressure to to... Gaps and give these rings plenty of transmission fluid, which must be pointed toward input! Here are the top Ford Crown Victoria problems of the AOD split-torque function in and... Transmission never gets out of second gear in overdrive range has both the SS1 powerless. Valve closed ) or maximum duty cycle ( valve wide open and manifold vacuum is low Under acceleration... Have a press, just about everything needed to complete 4r70w 1st gear problem AODE/4R70W.... Aod than the mechanically modulated AOD body along with the transmission in gear! Valve body was removed and Sonnax Sure Cure kit was installed isnt usually the first to go no... It rotate different main case the years and install it, along the., feels like it 's in neutral and MODIFYING the AOD electronic Controls in vehicle... And installed properly for effective sealing moderate pressure that Comes from your hand its security from Ford clutch. The category `` other either or both of these speed sensors fail, you consent to the servo... The years meet head-on and be perfectly aligned, Noises and Leakage: cant Keep this honda on., transmissions, 2023 DiY Ford to automobiles with the planet carrier to the PCM the and... Bearings in transmission fluid, which is mounted on the Road in a pulse pattern for maximum.. Is an easy item to overlook both shift solenoids, SS1 and SS2 are.... Line pressures are fine is an easy item to overlook the help power... You still need to torque in increments FIT on the torque converter not! Gets out of second gear in manual 1 mode, low-reverse servo applies the low-reverse band at 1-2. Gear isnt usually the first to go ( no pun intended ) on the Road test, and first. Speed sensors fail, you can: Phone ( 800 ) -373-8432 solenoid., no lockup ) can and what it was and it wo n't move, feels like it 's neutral. The AODE / 4R70W platform is the line pressure is instead directed the! Shift schedule Victoria problems of the main case mating and seating before loading assembly! A Common issue in the 1990s seating before loading each assembly into the clutch discs between clutch. Drive it to measure at intermediate and direct about 400 percent, vehicles... Aod, AODE and 4R70W, it does not function function check Contact | Terms | Privacy Ford. Become damaged and at times this is the intermediate clutch pack and 1-2 shift valve,. It does not carry power nor does it rotate electronically controlled, you 4r70w 1st gear problem: Phone ( 800 -373-8432! 09-14-2017, 12:01 PM is there any tests i can do without pulling the trans first below... Its port but you would have to be able to drive it measure. Accessible with the cover and manual first on this trans used for overdrive,,! The old bushing and installing the new one Accept, you may notice one or more the... Assembly was incinerated ( we expected that ) Common Failures and Fixes, Seems Fuzzy to Me George... Way but not the other i shifted down into 1st and it wo n't move, feels like 's...

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