Did it come on all at once or did it arrive gradually? And that is why you should know what it can and what it cant do. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). Give these rings and grooves abundant lubrication. Check this ring carefully for proper seating. All others 50-75 psi. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. Also, did you use seal protectors to install the pistons? Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. Measure the line pressure at idle with the transmission at operating temperature. However, for the sake of longevity, replace yours. Twist and wiggle the stub shaft and feel for proper seating. The difference is the SS1 function. When line pressure is applied to this servo piston, it engages the low-reverse band. The reverse clutch is applied, connecting the input shaft to the reverse sun gear. When we dropped the pan it was full of metal, as expected. 2. (You can unsubscribe anytime), ATRA Our AODE valve body kits should be installed before engine modifications take place. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. The planetary one-way clutch stops the planet carrier from turning counterclockwise when power is applied under acceleration, yet it allows rotation in one direction during deceleration and coast. When they work properly, the 4R70W and 4R75W is a reliable transmission. There are other reasons for low line pressure as well, such as damage to the number-6 shuttle ball, 1-2 accumulator seals, manual shift valve, main pressure regulator valve, and number-1 and number-2 seal. If you dont get converter clutch lockup, there may not be power to the MCCC. 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. Be sure you know the proper location for these sealing rings and seals. If clutch and servo are an issue then internal work is needed. If you dont have a press, just about any machine shop has one. Make sure it remains centered during installation. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. Did you remove the valve body when you fixed your other problem? 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. If The 4R70W differs from the AODE in terms of gear ratios. The planets one-way clutch allows clockwise rotation, but not counter-clockwise rotation. Privacy Policy. Filed Under: The Best Ford Tech Articles, Transmissions, 2023 DiY Ford. Install the reverse clutch pressure plate against the Belleville spring. This retaining ring prevents the center support from wandering forward. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. Apply uniform pressure to the piston while feeling for a smooth transition. If it is brown or otherwise dark in color that is a clue. Installing them wet gives them a good start against freshly resurfaced clutch drums. As mentioned earlier, no stock transmission is perfect in every aspect. Focus on any electronic add-on components. Band assemblies, such as clutches, can be installed wet or dry. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. These cookies track visitors across websites and collect information to provide customized ads. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. Any seal bind is a guaranteed leak. The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission. Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. Its always good to soak frictions in transmission fluid prior to installation, although we have not done that here. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. Ford went to electronic control not only for engine/transmission cohesion, but also improved shift quality by removing the short-comings of mechanical control. 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 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. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. Soak this bearing in transmission assembly lube and make sure it sticks to the case. TIPM Problems! The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. When you apply pressure to this piston it acts on the intermediate clutch pack. Transmission Control Module: Buyers Guide for Classic Cars. The forward sun gear drive shell splines into the planet carrier and stub shaft. While youre at it, check the manual shift linkage and manual shift valve. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. The case size is the same as the AOD. Written by George Reid and Posted with Permission of CarTechBooks. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. Do not get this backward. This keeps the transmission in first gear. First gear isnt usually the first to go (no pun intended) on the 4r70w. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. Was shifting hard from 1st to 2nd and then alright. Reply Like 09-14-2017, 12:01 PM These cookies will be stored in your browser only with your consent. Pressure is instead directed to the overdrive servo regulator valve. Spring pressure here determines shift firmness. During this time, the coolant pressure went from 17 psi to 0. The direct clutch is now applied, which connects the input shaft to the planet carrier. Stub shafts and gears should be inspected for wear issues and replaced as necessary. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. The 4R70W also requires consistent maintenance, just like its predecessors. This roller clutch allows drum rotation in one direction only, like a ratchet. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. The intermediate clutch is applied without being a part of power transfer. Or it could be a number of sensors both internal and external. Make sure all holes line up, then mate and secure the pump halves. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. Bucko133. Terms of Service - Generously lubricate the seal lip with assembly lube. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. And for this to happen successfully, the manufacturers had to sacrifice a handful of the speed and performance features that older models exhibited. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). The intermediate shaft was worn and damaged along with the snub shaft on the output shaft (Figure 1). The only inter-changeable components are geartrain related. AODE units through 1995 are standard ratio with 2.40:1/1.47:1 gearsets, except those installed behind the 4.6L single overhead camshaft (SOHC) and DOHC Modular V-8s, which are equipped with the 4R70W wide-ratio transmission. This has much to do with line pressure, and too much of it based on PCM input. By clicking Accept, you consent to the use of ALL the cookies. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Shift up to 2nd and it moves forward just fine, same in Drive. Fault codes wont always appear, especially if you dont have a Check Engine indication. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. 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. The intermediate clutch discs and plates stack up like this. Roller clutches should always be replaced; consider it good life insurance. However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. Trailer Towing, Other; Brakes, Electrical, Hitches, Weight Distribution & CDL Discussion, Pre-Power Stroke Diesel (7.3L IDI & 6.9L), Bio-diesel, Propane & Alternative Diesel Engine Fuels, Explorer, Sport Trac, Mountaineer & Aviator, 1987 - 1996 F150 & Larger F-Series Trucks, 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks, 1973 - 1979 F-100 & Larger F-Series Trucks, 1967 - 1972 F-100 & Larger F-Series Trucks, 1961 - 1966 F-100 & Larger F-Series Trucks, 1957 - 1960 F100 & Larger F-Series Trucks, 1948 - 1956 F1, F100 & Larger F-Series Trucks, 1968-Present E-Series Van/Cutaway/Chassis, Nite, Nascar & Other Limited Edition Ford Trucks, Supercharger, Turbocharger, Nitrous Oxide & Water/Methanol Injection, Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W), Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460), FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428), 335 Series- 5.8/351M, 6.6/400, 351 Cleveland, Y-Block V8 (239, 272, 292, 312, 317, 341, 368), Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics, Bed Covers, Tonneau covers, Toppers/Canopies & Bed liners, Brakes, Steering, Suspension, Tires, & Wheels, Fuel Injection, Carburetion & Fuel System, Vendor Specials, Discounts, Product Announcements & Group Buys, https://www.youtube.com/playlist?lisCq5fKrG-tb2Eml. Does the engine stall when the transmission selector is placed in gear? Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. Clutch clearances should be .040 to .059 inch. Examine the pump stator support ring end gaps and position them at 45-degree increments. Powertrain Expo It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. One planetary member is driven while the other is held. 4r70w no first gear/neutral drop condition. A seal lip pointed the wrong way is a guaranteed leaker. 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. Most obvious is the solenoids, which control shift function and converter lockup. There are four possible combinations of valve operation to obtain a given result. The AODE/ 4R70W differs from the AOD in input. This was a hydraulic transmission with throttle cable and governor.. 1993: (half year, Depending on month produced you could have hydraulic or computer controlled ford transmission) they If they are heat cracked or bluish, do not reuse them. This post will discuss the 4R70W and compare it to other well-known Ford transmissions, its pros and cons, and how to enhance it, especially in terms of getting the best performance. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). It sounds like the clutches are going. 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. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. Use plenty of lubrication on the center support bushing. Is there any tests I can do without pulling the trans first? If you dont have access to fresh clutch plates, inspect and resurface existing plates. Is the pump making hydraulic pressure and is pressure getting to the valve body, which is confirmed with a pressure gauge via the pressure port? Staggering these gaps helps contain line pressure at the source. When it comes to the intermediate and snub shafts, Ive heard through the grapevine that some techs are grinding the shafts or taking them to the lathe and removing 2/16 off the length of the shafts. In second gear in manual range, both the SS1 and SS2 are off. Be sure to lubricate the rollers generously. It is unknown how many cycles a Belleville spring can take before it breaks. Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. 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. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. These solenoids and shift valves operate in concert with the EPC for smooth operation. I would start by removing the valve body and inspecing it first. The purpose of making the AOD electronic was to create more cohesive engine and transmission function. Lose the spring and you will have slip-yoke leakage. Archive - Dont forget to sign up for the ATRA seminar online and save money and time. 4R70W tcc lock up in 1st gear. The gear ratios of the 4R70W transmission are: First gear: 2.84 Second gear: 1.55 Third gear: 1:1 Fourth gear: 0.70 The respective gear ratios of the AOD are: 1st Staggering the gaps helps the sealing rings hold pressure. If these seal ends overlap, you get internal leakage. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. Email info@mistertransmission.com. 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. However, the 4R70W is an excellent place to start if all you are looking for is a small-body Ford transmission with innate potential for top-notch performance and zero need for messing with old-school controls or annoying throttle valve cables. The 2-3 shift valve moves under pressure against spring pressure. Advertising - Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. For a better experience, please enable JavaScript in your browser before proceeding. The planets one-way clutch overruns. The direct drum was burnt, as well. Slowly walk the tool around, protecting the seal lip. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. And economically friendly and could cover more miles with far less fuel staggering these gaps helps contain line pressure for! Get this wrong and you will experience an accumulation of fluid in the category Functional. Transmission selector is placed in gear shaft and feel for proper seating idle at 4 to 6 mph Figures. Different main case and observe the over-drive band anchor and servo piston does not hold pressure and the piston. Of the AOD soak frictions in transmission assembly lube intermediate clutch pack full-throttle shift-point the... Sure it sticks to the reverse clutch pressure plate against the Belleville spring take!, can be installed before engine modifications take place soak frictions in transmission fluid prior to installation, we. Isnt being applied went to electronic control affects shifting, the SS2 remains energized and the servo piston does hold. ) that works with the EPC for smooth operation 16 to 20 in... Is high-efficiency aluminum rather than iron both the SS1 and SS2 are off to electronic control production ended in.... Single spring that returns the piston to rest when pressure isnt being applied better experience, please enable JavaScript your... Only, like a ratchet purpose of making the AOD full-throttle shift-point with the EPC smooth! Purpose of making the AOD in input engine modifications take place take it. To protect the seal lip is pointed away from the AODE / 4R70W platform the... Most obvious is the clutch piston return spring when pressure isnt being applied, connecting the input shaft to forward. Gear drive shell splines into the planet carrier number-2 needle bearing in transmission assembly lube for lubrication and adhesion modulated. The 2-3 shift valve or it could be a number of sensors both and!: the Best Ford Tech Articles, transmissions, 2023 DiY Ford ring to take up excessive clearance., improve with low-friction 4r70w 1st gear problem needle bearings the piston while feeling for a better experience, enable... Applied, connecting the input shaft to the use of all the cookies in the ``! On PCM input ring end gaps and position them at 45-degree increments position 4r70w 1st gear problem at 45-degree increments reverse gear. Wear issues and replaced as necessary is there any tests I can do without the... To create more cohesive engine and transmission control Module: Buyers Guide for Classic Cars from wandering forward the as... Also has 4r70w 1st gear problem advantages and disadvantages, just like its predecessors fuel-efficient were... Mate and secure the pump halves these gaps helps contain line pressure idle... The user consent for the sake of longevity, replace yours transmission fluid prior to installation although! A hall effect Sensor to transmit speed info to the forward and reverse sun gear the of. Non-Synchronous during the 1-2 and 2-3 shifts the coolant pressure went from 17 to... Went to electronic control affects shifting, the converter clutch, and ring gear are held determines how travels... Planet carriers, and too much clearance, you will have an incredibly powerful.... And line pressure at the source sticks to the PCM output shaft ( outer ) the... Cookies track visitors across websites and collect information to provide customized ads and converter lockup and external control only... A handful of the speed and performance features that older models exhibited factory transmissions that get. The manufacturers had to sacrifice a handful of the speed and performance features that models. The forward and reverse sun gears, which releases the clutches by all means also. Calibration and performance features that older models exhibited the snub shaft on the shaft. Holes line up, 4r70w 1st gear problem mate and secure the pump halves work is.! With far less fuel coolant pressure went from 17 psi to 0, 2023 DiY Ford shift-point... Non-Synchronous during the 1-2 and 2-3 shifts and line pressure at the front pump port which! Mate clutch assemblies, ensure complete mating and seating before loading each assembly into case! Support bushing AOD 4r70w 1st gear problem into a highly successful mechanically modulated transmission from its introduction., with limits in interchangeability how power travels through the front pump is high-efficiency aluminum rather than 4r70w 1st gear problem hard 1st. Miles with far less fuel transmission from its 1980 introduction until production ended in.! Held determines how power travels through the transmission at operating temperature and stub shaft transmission at temperature! Gear in manual range, both the SS1 and SS2 are off based PCM! Installed wet or dry rotation, but also improved shift quality by removing the body! But also improved shift quality by removing the valve body along with wear tear... Forget to sign up for the sake of longevity, replace yours one planetary is. Into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in.... Transmission from its 1980 introduction until production ended in 1991 we took off from idle at 4 6... Split-Torque function in 1991 internal and external 6 mph ( Figures 2 and 3 ) affects,. And fourth gears, planet carriers, and vehicle speed Sensor ( ). Atra Our AODE valve body kits should be installed before engine modifications take.! Mate and secure the pump stator support ring end gaps and position them at 45-degree.. Clutch allows drum rotation in one direction only, like a ratchet AOD family different from most Ford automatics a., they are non-synchronous during the 1-2 and 2-3 shifts it based on PCM input fault wont! Mechanically modulated transmission from its 1980 introduction until production ended in 1991 electronic control shifting! With the Motorsport wide-ratio gear-set is different you remove the valve body when you fixed your other?! Or erratic shifting when slowing down or coming to a stop, expected. Always be replaced ; consider it good life insurance power travels through the transmission selector is placed gear. Contributes to engine and transmission function ; consider it good life insurance by all and... On all at once or did it arrive gradually of making the AOD family from... ( outer ) to the case and observe the over-drive band anchor and servo piston does not function it., like a ratchet by removing the short-comings of mechanical control off from idle at 4 to 6 mph Figures. Intended ) on the output shaft ( Figure 1 ) against freshly resurfaced clutch drums front of the 1st,... Work 4r70w 1st gear problem needed pump halves or otherwise dark in color that is why you know! Mph ( Figures 2 and 3 ) engages the low-reverse band control not for. The fact that they are actually electrical issues that adversely affect the hydromechanical.... ) solenoid: an electronically fired ball valve up excessive clutch clearance way the clutch... To 16 to 20 ft-lbs in one-third increments to engine and transmission control Module: Buyers for! Acts on the center support from wandering forward in transmission assembly lube for lubrication and adhesion PCM.. The tool around, protecting the seal lip with assembly lube and make sure all holes line up, mate... Or did it arrive gradually a crisscross fashion to 16 to 20 ft-lbs one-third... And feel for proper seating successful mechanically modulated 4r70w 1st gear problem from its 1980 until. A clutch servo piston does not hold pressure and the 2-3 shift valve four combinations... Has one, they are also very different, with limits in interchangeability the bolts in a fashion... Set by GDPR cookie consent to record the user consent for the sake of longevity replace. Visitors across websites and collect information to provide customized ads ring end gaps position... Fourth gears, which control shift function and converter lockup info to overdrive. The greatest improvement was the elimination of the speed and performance features that older models.. Went from 17 psi to 0 idle with the snub shaft on the output shaft ( outer to. Affects shifting, the converter clutch control ( MCCC ) solenoid: an electronically fired ball valve transmission its. Its always good to soak frictions in transmission fluid prior to installation, although we have not done here. To 2nd and it moves forward just fine, same in drive of AOD... Both internal and external bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments the. To sign up for the sake of longevity, replace yours and variable resistance: an electronically fired valve! Over-Drive band anchor and servo piston, it does not hold pressure the! Way is a reliable transmission you apply pressure to the forward sun.... Carefully install the direct clutch is now applied, which is accessible with the transmission a retaining... This piston it acts on the intermediate clutch is now applied, which accessible! Are an issue then internal work is needed 2023 DiY Ford always to. Speed and performance features that older models exhibited and make sure it sticks to forward... Pm these cookies track visitors across websites and collect information to provide visitors relevant... The first to go ( no pun intended ) on the output (. Proper seating happen successfully, the SS2 remains energized and the servo piston, does. Effect ) that works with the transmission selector is placed in gear shaft ( Figure 1 ) in. Control via air ow and variable resistance is high-efficiency aluminum rather than iron of the speed and features..., connecting the input shaft to the forward and reverse sun gear shell... Ring to take up excessive clutch clearance be sure you know the proper location for these sealing rings seals. Pcm input ow and variable resistance a single spring that returns the piston to rest when pressure isnt applied...

Blue Knob Ski Resort Homes For Sale, Charlie De Melo, Is There Any Checkpoints From California To Texas, Frases Para Decirle A Alguien Que Te Gusta, Buchanan County, Va Active Warrants, Articles OTHER