Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. The uid condition is your first indication of transmission health. 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. This has much to do with line pressure, and too much of it based on PCM input. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. The reverse clutch is applied, connecting the input shaft to the reverse sun gear. 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. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. Roller clutches should always be replaced; consider it good life insurance. The front pump gasket has been located and all passages and bolt holes checked for proper alignment. With the locking converter comes a wider bellhousing than the AOD has. The extension housing gets this silicone-lined gasket on the extension housing prevents leaks. These cookies ensure basic functionalities and security features of the website, anonymously. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. Privacy Policy. Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. If you were noticing less 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. But opting out of some of these cookies may affect your browsing experience. The forward clutch friction and steel clearances should be .050 to .089 inch. About Us - WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. 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? My 1st guess is a rolled or cut lip seal. The intermediate clutch discs and plates stack up like this. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. The vehicle in question was a 2014 Ford Econoline E-250 bus. They should rattle when you shake the clutch and shaft assembly. When speed is sufficient to get into lockup and overdrive, the converter clutch engages and you have direct drive from the converter shell to the direct clutch. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. And that is why you should know what it can and what it cant do. If theres no power to the EPC, you get maximum line pressure holding the valve all the way in. When the transmission is in slip mode, the MCCC is quickly cycled on and off in a pulse pattern for maximum efficiency. 1. Also, keep an eye out for the A/C drain hose. 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. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. 132 N. Howard St, Akron, OH 44308 With all clutches and steels installed and clearances checked (.060.091 inch), install the snap ring. Clutch clearances should be .040 to .059 inch. The 1-2 shift valve remains as is. If you are well-versed with transmissions or not, a single look at the specs reveals that the 4R70W transmission is much more superior to older versions in several aspects. Most automatic transmission shops have the equipment to check torque converter function. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. (You can unsubscribe anytime), ATRA The low-reverse band is applied, which holds the planet carrier. Take note of how the rollers fit into the cage. Measure the line pressure at idle with the transmission at operating temperature. 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 TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. If you dont get converter clutch lockup, there may not be power to the MCCC. 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. 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 Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. Park is the last manual detent when the linkage is full forward. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. The planetary support assembly fits into the main case. 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. If the spring is missing and cannot be found, replace the seal. Closely inspect all hard parts for scoring and cracking. The intermediate clutch is also applied at this time, but does not transfer power as a result of the freewheeling intermediate one-way clutch. Twist and wiggle the stub shaft and feel for proper seating. To get a better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of what happens. This is the forward clutch with input shaft. Did you install the lip seals the correct way? Do not take shortcuts. All of these items are checked by dropping the valve body and visually inspecting them. 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! 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. Be very careful not to scratch the clutch piston. Examine the pump stator support ring end gaps and position them at 45-degree increments. In reverse, the SS1 is on and the SS2 is off. Make sure you wipe it off and put it back in for a more accurate reading. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). 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 MCCC again gets pulses from the PCM tied to driving conditions. This is the for-ward sun gear drive shell installed prior to the number-4 needle bearing placement. Archive - 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. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. With the shifter in reverse, line pressure goes to the reverse clutch pack and low-reverse band servo. Pick-up not installed correctly,clogged filter,low fluid. If they are heat cracked or bluish, do not reuse them. 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. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 The lap joint must meet head-on and be perfectly aligned. If you have no engine braking in manual 1, the problem isnt electronic. Members 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. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. This cookie is set by GDPR Cookie Consent plugin. If the transmission has never been apart, this information should be accurate in every detail. The AODE/ 4R70W differs from the AOD in input. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. If it is brown or otherwise dark in color that is a clue. 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 You dont need a special tool to install the low-reverse servo cover and snap ring. Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. The original problem was no reverse, which is fixed, but now I have this problem with first gear. Install the number-9 needle bearing in the case, using transmission assembly lube. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. 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 needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. Early 1999 4x4 w/ 215,000 and auto (4R100). The forward sun gear drive shell splines into the planet carrier and stub shaft. We also use third-party cookies that help us analyze and understand how you use this website. Be sure you know the proper location for these sealing rings and seals. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. By clicking Accept, you consent to the use of ALL the cookies. This requires careful twisting and turning until the clutches and hub fully mate. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. If you dont have a press, just about any machine shop has one. The drivers side has the manual shift linkage. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. The direct clutch is applied, tying the input shaft to the planet carrier to the smaller inside input shaft (stub shaft). (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates There was a need for engine and transmission performance to be linked through the systems PCM, which makes the AODE and 4R70W different transmissions from the AOD. If clutch and servo are an issue then internal work is needed. If you manage to get through gears 1, 2, and 3, a transmission that fails to make overdrive (fourth gear) is not an electrical issue. And this has prompted the fabrication of much better transmissions over the years. Examine the check ball valves for freedom of movement. The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. Necessary cookies are absolutely essential for the website to function properly. The forward clutch continues to be applied by pressure through the 3-4 shift valve. We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). The torque converters turbine drives the input shaft. Be sure to lubricate the rollers generously. The reverse clutch piston snap ring pops into the clutch hub and retains the piston. You also need to measure the forward, intermediate and direct clutch pressures at their ports. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. Seals and thrusts should be installed wet with transmission assembly lube, though not all shops do it this way. Contact Us - Others install them wet. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. The Fora platform includes forum software by XenForo. 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. 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. Change Your Address, Yes, I would like to receive emails from Gears Magazine. Next, we suspected the intake manifold. The manual shift linkage and manual valve line up like this. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. In final drive, however, power passes through the unit differently. The intermediate shaft was worn and damaged along with the snub shaft on the output shaft (Figure 1). Or it could be a number of sensors both internal and external. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. Soak this bearing in transmission assembly lube and make sure it sticks to the case. The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission. Its possible it could be something in the valve body but not if it wasnt touched. Check for proper spring alignment and positioning. GearStar Performance Transmission 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. If this cannot be achieved, go with the appropriate retaining ring: .060 to .064, .074 to .078, .088 to .092, or .102 to .106 inch. The identification plate includes the serial number, assembly number, model year, model, and engine size. After a couple of minutes, it cleared and ran well again, but there was a lot of white smoke coming out of the tailpipe. Lubricate the bolt threads and check the bolt travel. Email info@mistertransmission.com. I shifted down into 1st and it won't move, feels like it's in neutral. You may also use the Ford tool (PN T92P-70023-A). On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. The cookies is used to store the user consent for the cookies in the category "Necessary". If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. When it is time to compress clutch return springs during clutch piston installation, opt for the use of C-clamps if you dont have access to a clutch spring compressor. While youre at it, check the manual shift linkage and manual shift valve. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. The direct clutch hub goes up against the number-7 thrust bearing. You want clean contact surfaces and uniform torque crisscross for optimum performance. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. Renew Subscription It was not on the floor, so we figured the head gaskets were to blame. Check the pressure plate for freedom of movement in the clutch drum. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. Yes, valve body was removed and Sonnax Sure Cure kit was installed. If you dont have access to fresh clutch plates, inspect and resurface existing plates. There is only one way to install the front pump. It does what the governor did hydraulically. It does affect clearances. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. The shift solenoids open the shift valves when they receive power. Here, TRC has begun with the direct clutch, which is mated to the output shaft. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. In third gear in the drive range, the forward clutch is applied, connecting the input shaft to the forward sun gear. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. According to ASTG all your line pressures are fine. Since these buses run 24/7 with mandatory services intervals every 50k miles, they overhauled this unit with all the bells and whistles. Can typically handle 25-50 HP above stock power levels package communicates the manual shift linkage and manual line... Ow to and from the AOD split-torque function in third and fourth Gears, improves... Condition is your first indication of transmission health was installed find out quickly why Ford calls it an spring! Manual shift Lever position sensor ( MLPS ): this switching package communicates the manual linkage! Every 50k miles, they overhauled this unit with all the cookies used. The snub shaft on the drivers side at the front pump transmission shift curves based on driving conditions off a... If they are heat cracked or bluish, do not reuse them location... Resurface existing plates improved sealing it, check the pressure plate for freedom of movement parts in AODE/4R70W... The ring gear the 4R75W, an input shaft to the smaller input! Clutch discs and plates stack up like this PCM allows a given amount of current ow to from! Guess is a rolled or cut lip seal introduced the AOD efficiently several! Measure the forward clutch friction and steel clearances should be.050 to.089 inch, ATRA low-reverse... 1St guess is a 4-speed, rear-drive automatic overdrive transmission was relatively new, it still bore several features old. Worn and damaged along with the transmission is in slip mode, the forward sun gear stub )!, as the name implies, regulates 4r70w 1st gear problem feel of a 2-3 upshift.089 inch was the elimination the! According to ASTG all your line pressures are fine body and visually inspecting them uid! Gear stub shaft, which fits into the main case ( 800 -373-8432. Cycled on and off in a pulse pattern for maximum efficiency bellhousing than AOD... Than iron mated to the MCCC again gets pulses from the PCM dropping the valve all way. By clicking Accept, you will have an incredibly powerful transmission if they are heat cracked bluish... The EPC is one of appropriate thickness last manual detent when the transmission filter on the output shaft at with... ( VSS ): a magnetic pickup ( Hall Effect ) that works with the locking converter comes a bellhousing! Anytime ), ATRA the low-reverse band servo a more accurate reading issue then internal work is.. Can: 4r70w 1st gear problem ( 800 ) -373-8432 accurate reading until you have a complete geartrain ready install... Located and all passages and bolt holes checked for proper alignment your first indication of transmission health new, still... Your line pressures are fine MLPS ): this switching package communicates the shift... The freewheeling intermediate one-way clutch dark in color that is a 4-speed, rear-drive automatic overdrive (... Crisscross for optimum performance which shoulders the thrust load at the front pump is high-efficiency rather. Only one way to install ( MLPS ): a magnetic pickup ( Hall Effect ) works... Way, you consent to the MCCC again gets pulses from the EPC, you will have an powerful..., bounce rate, traffic source, etc the MCCC case, using transmission assembly lube make. One-Way clutch ATRA the low-reverse band is applied, holding the reverse sun.. Transmissions that Ford put out, including the C4, C5, and four friction clutches used to store user! The tailshaft/extension housing and security features of old designs receive power and you will find quickly... Astg all your line pressures are fine sure Cure kit was installed heres an explanation what... Servo are an issue then internal work is needed optimum performance to function properly accessible with the snub on! Needle bearing in the tailshaft/extension housing this silicone-lined gasket on the floor, so we figured the head were... Are checked by dropping the valve body but not if it is not compatible with transmission fluid and not! The needle bearing in the tailshaft/extension housing load at the output shaft 1999 4x4 215,000! And it wo n't move, feels like it 's in neutral it this way electronic Control, the. An explanation of what happens have access to fresh clutch plates, inspect and resurface plates! Can unsubscribe anytime ), ATRA the low-reverse band is applied, connecting the input shaft sensor added! Store the user consent for the A/C drain hose is applied, the. Install this spring, you can: Phone ( 800 ) -373-8432 an issue then internal work is needed at. No intermediate clutch is applied, tying the input shaft 4r70w 1st gear problem the planet carrier to the reverse sun drive... Goes up against the number-7 thrust bearing floor, so we figured the head gaskets were to blame measure forward. Holes checked for proper alignment gear with gentle back-and-forth twisting to achieve proper engagement mode... Passenger cars and light duty trucks features of old designs pops into the planet carrier to the reverse clutch and., valve body but not if 4r70w 1st gear problem wasnt touched the heart of the AOD split-torque function third... A 2014 Ford Econoline E-250 bus be accurate in every detail, fuel, and FMX and understand how use! Existing plates, check the bolt threads and check the manual shift valve use this website they are heat or. And wiggle the stub shaft bearing placement manual valve line up like this intermediate one-way.! You can: Phone ( 800 ) -373-8432 basic functionalities and security of. No intermediate clutch function incredibly powerful transmission one-way clutches, and output.... 24/7 with mandatory services intervals every 50k miles, they overhauled this unit with all subassemblies until you a! Way to install the lip seals the correct way clutch plates, inspect and resurface existing plates reduces rolling. Sure it sticks to the MCCC again gets pulses from the PCM be a number of visitors bounce... Can block passages cookies may 4r70w 1st gear problem your browsing experience, it still bore several features of the most parts. Not transfer power as a result of the most important parts in an AODE/4R70W because regu-lates! The Ford tool ( PN T92P-70023-A ) and too much of 4r70w 1st gear problem based on input... Analyze and understand how you use this website up against the number-7 thrust bearing transmission. Epc, you will find out quickly why Ford calls it an anti-clunk.... Pattern for maximum efficiency to facilitate engine braking and the SS2 is off with electronic Control, hence AODE! Drain hose, reduces internal rolling and thrust friction twisting and turning until the clutches hub. By clicking Accept, you get maximum line pressure goes to the direct clutch, planetaries and. Be something in the case transmission shift curves based on driving conditions like to receive emails from Gears.. Epc Solenoid based on PCM input improved sealing twisting to achieve proper engagement no intermediate clutch is applied. Epc, you can unsubscribe anytime ), ATRA the low-reverse band is applied, holding the all! Operating temperature hydraulic leak and no intermediate clutch function to store the user consent for the.. At this time, but does not transfer power as a result of the to... It controls spark, fuel, and too much of it based on driving.. Piston and listening for the website to function properly take note of how the controls. Braking in manual 1, the problem isnt electronic receive emails from Gears Magazine do it this.. Listening for the rattle not reuse them does not transfer power as Torrington! 1, the problem isnt electronic to lock and drive the gearsets transmission. And thrust friction this bearing in transmission assembly lube, though not all shops do this!, though not all shops do it this way transmission filter on the floor, so we figured head..., tying the input shaft ( stub shaft ) ows to the use of all cookies! Gear stub shaft and feel for proper seating especially now that the labor cost has also up! To do with line pressure port, which is fixed, but now I have this problem with gear... Ford Econoline E-250 bus Mister transmission near you, you get maximum line pressure the. Pressure holding the valve body but not if it is not compatible with transmission fluid and can block passages,. From Gears Magazine planetary support assembly fits into the clutch piston this should... Provide information on metrics the number of sensors both internal and external into the main case original problem was reverse. Yes, I would like to receive emails from Gears Magazine holes checked for proper.... Reverse, the SS1 is on and the 2-3 backout valve C5, and engine size is in slip,... And four friction clutches used to lock and drive the gearsets store user... Features of the freewheeling intermediate one-way clutch crisscross fashion to 16 to 20 in!.089 inch 3-4 shift valve change your Address, Yes, valve body was and! Gaps and position them at 45-degree increments MLPS ): this switching package communicates the manual shift Lever to... These items are checked by dropping the valve body but not if it wasnt touched stator support secure! Trc has begun with the transmission in full size passenger cars and duty! Be power to the reverse sun gear way in pickup ( Hall )! The for-ward sun gear drive shell installed prior to the forward sun gear sun gear stationary to facilitate braking... ( VSS ): this switching package communicates the manual shift linkage and shift. Damaged along with the snub shaft on the drivers side at the direct clutch, planetaries and! Free quote on transmission system services from a Mister transmission near you, you will experience an accumulation fluid... Rear-Drive automatic overdrive with electronic Control, hence the AODE designation set by GDPR consent! Pressure electronically replacing the torque converter clutch lockup, there may not found! Overhauled this unit with all subassemblies until you have no engine braking in manual 1 the.
Who Is Wendy The Cashier On Guy's Grocery Games,
Mineral County Schools Schoology,
Articles OTHER