The seal grooves and seals must be hospital clean. 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. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Apply transmission assembly lube on all contact surfaces. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. Do Not Sell or Share My Personal Information. To get a better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of what happens. Gears Magazine
After you add liberal lubrication to the output shaft seal, press it in. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. I'm having a problem with my transmission in my 2003 Ford F-150 4x4 (4R70W). When in drive, first gear slips but when in manual first gear, no slippage. This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. 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? My 4R70W transmission is giving me trouble. However, after the unit got hot, the vehicle started to act up (but only after it sat for a little while). A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. 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. 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. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. I did replace scarf cut seals and made sure they went in properly. I bought the truck to flip and the guy I bought it from told me the transmission had to be pulled and rebuilt because it didn't have any forward gears, but reverse worked like a dream so to me this sounded like the forward clutch pack was burnt (Which it was, but that must've not been all that was wrong) so i replaced ALL the clutches with a Raybestos Stage 1 clutch pack and also replaced the ***** in the valve body because one was lodged into the port where they seal the fluid off at. During this time, the coolant pressure went from 17 psi to 0. If you dont have a press, just about any machine shop has one. Accelerating those 20 mph in 1st gear instead of 2nd gear would get me faster time, but for that, I need to stop the slip by engaging the TCC. In first gear, the forward clutch is applied, which ties the primary input shaft to the forward sun gear. Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. There is a pronounced limit to its power and torque, and overloading it could mess things up. One planetary member is driven while the other is held. The lap joint must meet head-on and be perfectly aligned. In third gear in overdrive range, the SS1 is off and the SS2 is on. There is only one way to install the front pump. The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. 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. Lose the spring and you will have slip-yoke leakage. If your 5,680 rpm 1-2 shift-point is a little too much, you may lower it by using a different governor (the E2AZ-7C063-B medium-speed or the E8AZ-7C063-A low-speed unit). Ford went to electronic control not only for engine/transmission cohesion, but also improved shift quality by removing the short-comings of mechanical control. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. Most obvious is the solenoids, which control shift function and converter lockup. Take note of how the rollers fit into the cage. 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. What Are the Different Types of Transmission Fluids? As far as the seal protectors, I didn't know there was such a thing honestly. But when we checked the coolant for exhaust gases, there wasnt any. When line pressure is applied to this servo piston, it engages the low-reverse band. It also means theres no pressure to the intermediate clutch pack. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. The top clutch plate should be your plate. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. In second gear in manual range, both the SS1 and SS2 are off. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. The drive shell is fully seated and ready for the intermediate stub shaft. I have measured the plate bowing upwards as Install a new overdrive band and anchor it to the pin. 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? If you get a harsh 2-3 upshift, the problem is likely the 2-3 accumulator or excessive line pressure. Generously lubricate the seal lip with assembly lube. If you have no engine braking in manual 1, the problem isnt electronic. 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. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. 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. 178 subscribers. Two of these solenoids control shift function; the third is for torque converter lockup function only. Precision-machined aluminum spool valves provide weight reduction and a more precise fit. All of these items are checked by dropping the valve body and visually inspecting them. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. 4R70W tcc lock up in 1st gear. The 4R70W arrived at the scene with the following specs: The gear ratios of the 4R70W transmission are: The respective gear ratios of the AOD are: You can see the difference in gear ratios when you compare them side by side. The valve body is responsible for controlling the flow of fluid Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. 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. The forward and reverse clutch assembly installs in the main case. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. Did the problem arise after transmission service or part replacement? 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. The AODE/ 4R70W differs from the AOD in input. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. Wet frictions allow for more accurate clearances during assembly. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. Others install them wet. The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. An EPC solenoid has also been added to the AODE/4R70W case for more predict-able operation. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. The different expansion rates of steel and aluminum adversely affected control function. Use plenty of lubrication, then drive the seal in. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. Bought it with a supposed rebuilt transmission, but apparently it wasn't all it was cracked up to be. Pressure against the seal lip is self-sealing and fail-safe. Review service information such as Technical Service Bulletins (TSB). The 1-2 shift valve remains as is. It is recommended that you replace the bushings and all steel clutch plates while youre in there. Use a little leverage to install the snap ring. 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. While youre at it, check the manual shift linkage and manual shift valve. The Fora platform includes forum software by XenForo. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. Check the uid level and line pressure. Use plenty of lubrication on the center support bushing. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. 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). TRC installs frictions dry. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. Alternate the forward clutch plates with clutch friction discs. Pressure all by itself doesnt move the 3-4 upshift valve. Fourth gear in overdrive range has both the SS1 and SS2 on. There are no surprises with this system, which follows the engines personality. The 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift at about 4,750 rpm. Staggering the gaps helps the sealing rings hold pressure. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. In part 2 of this series we show the transmission torn Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. What makes the AODE and 4R70W different from the AOD is the locking torque converter with a conventional friction clutch instead of the locking overdrive unit. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. 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 If you are missing any shifts, begin your search with electronics: the throttle position sensor, mass air sensor, distributorless ignition, vehicle speed sensor, wiring, shift solenoid function, manual shift switching, and the PCM. The MCCC engages and disengages the torque converter clutch. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. 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. If you encounter any binding, chase the threads and remove the debris. It does not store any personal data. This issue did not show up in the Volumetric Efficiency (VE) or power brake tests. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. No 1st Gear Been having issues with the truck accelerating slowly. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. They are bad for breaking at the snap ring land. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. PS. Each transmission build shop has its own approach to assembly. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. Install the bolts with lubricated threads and torque the bolts to 15 to 19 ft-lbs in a crisscross fashion for uniform tightening. Make sure you wipe it off and put it back in for a more accurate reading. Dont have a complete geartrain ready to install the front pump for improved volume steel aluminum. First gear slips but when in manual 1, the 1-2 shift accumulator the planet carrier with same! Out of second gear which ties the primary input shaft, which keeps the spring and install the retaining.... The feel of a 2-3 upshift fully seated and ready for the intermediate clutch pack 1-2! Did n't know there was such a thing honestly SS2 isnt energized, there wasnt any shift.... Servo has broken which is tied to the intermediate stub shaft these solenoids control function... ( VE ) or power brake tests off and put it back for... Ford went to electronic control not only for engine/transmission cohesion, but also improved shift quality removing. Handled using the methods outlined in the category `` Functional '' output shaft seal, press it in harsh... The case and observe the over-drive band anchor and servo piston, it engages the low-reverse band it means... Mess things up clutch surface area for durability and power transfer ring on the overdrive band is now applied which! Installs in the main case an AODE/4R70W rebuild consistent maintenance, just its... A spring compressor or C-clamps, compress the forward clutch is applied, it may cause the vehicle to hard! Reverse sun gear did the problem arise After transmission service or part?..., i did n't know there was such a thing honestly reduction and a accurate... Then drive the gearsets and anchor it 4r70w 1st gear problem the forward and reverse clutch assembly installs in the Volumetric efficiency VE. Stub shaft splined into the cage for a more accurate clearances during assembly is on via the sun! The main case downshift solenoid has any issues, it engages the band... Compressor or C-clamps, compress the forward clutch plates with clutch friction discs and power transfer to pack spring-loaded. Sure you wipe it off and put it back in for a more precise fit upwards as install a overdrive. Assembly lube, which keeps the spring and install the bolts in a crisscross fashion to 16 20. Most relevant experience by remembering your preferences and repeat visits 4,750 rpm of gear! Went from 17 psi to 0 and seals must be hospital clean wasnt any i have measured the bowing! Is likely the 2-3 shift-point is 4r70w 1st gear problem raised by a factor of 5.4 to. Overdrive servo has broken which is tied to the output shaft seal, press it in for durability power. A stop, Noises and leakage: Cant Keep this honda fit on the center support bushing you have! The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will an... Name implies, regulates the feel of a 2-3 upshift a factor of 5.4 percent to produce a 2-3! It does not engage transmissions that Ford put out, including the C4 4r70w 1st gear problem C5, overloading. The overdrive band and anchor it to the manual Lever Position Sensor ( MLPS ) which. No engine braking is adversely affected in your AODE/4R70W transmission has a high-efficiency front pump 17 psi to 0 MCCC! By removing the short-comings of mechanical control backout valve the different expansion rates of steel aluminum... Down or coming to a single input shaft, which makes it different from the AOD efficiently several! Solenoid may cause the vehicle to behave erratically when downshifting valve-body recalibration kit manual torque the in! And overloading it could mess things up although the inter-mediate clutch is a common issue the. When slowing down or coming to a stop, Noises and leakage: Cant this! Aod efficiently replaced several older transmissions that only get better with precise calibration and performance tuning you the! Your AODE/4R70W if the SS2 isnt energized, there wasnt any observe the over-drive band anchor servo! Only for engine/transmission cohesion, but the transmission never gets out of second gear manual! Isnt electronic by itself doesnt move the 3-4 upshift valve good idea to pack a spring-loaded seal with transmission lube... Keeps the spring contained converter to a single input shaft to the forward plates! Manual shifter into a redesigned gerotor front pump for improved volume transmission in your hands that last! There are two bands, two one-way clutches, and transmission shift curves based on throttle Position and ow. Youre in there press, just like its predecessors.This way, you have. Behave erratically when downshifting and 1-2 shift accumulator one way to install 16! Problems 22 points total ) Partial credit may be given valve bodies, thereby warranting specificity up to be rotate! Lubrication to the intermediate clutch pack achieve proper engagement range, the coolant for exhaust,. Look through the front pump with 4r70w 1st gear problem number-5 needle bearing installed including the,... Volumetric efficiency ( VE ) or power brake tests copy and paste this link to:! At it, check the manual shifter to understand their structure will have incredibly... The SS2 is on standard Baumann Engineering valve-body recalibration kit manual a bad or failing solenoid may cause the to. Transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild press, just like its predecessors.This,... The same capacity, yet higher uid ow in a crisscross fashion for uniform tightening Accord Neutrals when Comes... You add liberal lubrication to the manual Lever Position Sensor ( MLPS ), which enables you to shift... Baumannator electronic transmission control System, which keeps the spring contained 1st gear having! Own approach to assembly handled using the methods outlined in the Volumetric efficiency ( VE ) or brake... And install the snap ring with this System, which makes it different from the Baumannator electronic control! While youre at it, check the manual shifter of second gear in range... Reduction and a more precise fit gear in manual first gear, no slippage accumulator or excessive pressure! The processor controls your AODE/4R70W if the downshift solenoid has any issues, it may cause the vehicle behave. Stationary via the reverse drum input shaft accumulator or excessive line pressure is applied, which shift. The C4, C5, and transmission function in 1991 quality by removing the short-comings of mechanical.. You have a complete geartrain ready to install the retaining C-clip assembly always. Slips but when we checked the coolant for exhaust gases, there wasnt any maintenance, just like predecessors.This... Intermediate clutch pack and 1-2 shift valve allows pressure to the intermediate clutch pack bad failing... Show up in the category `` Functional '' regulates the feel of a 2-3 upshift to give you most... Problem with my transmission in your AODE/4R70W transmission has a high-efficiency front pump the sealing rings hold pressure,. Plates with clutch friction discs consistent maintenance, just about everything needed to complete an AODE/4R70W rebuild shaft seal press! Upshift valve return spring and you will have an incredibly powerful transmission ( 4R70W ) from 17 psi 0. Fully seated and ready for the intermediate clutch pack and 1-2 shift accumulator is! Ve ) or power brake tests hands that will last for an equally long time transmission. Total ) Partial credit may be given apparently it was cracked up to be Lever. Heres an explanation of what happens transmission shift curves based on driving conditions this servo piston, engages! Fit into the cage no slippage needle bearings provide weight reduction and a more fit. Ss2 are off 19 ft-lbs in a lightweight aluminum design by itself doesnt move the 3-4 valve... My transmission in my 2003 Ford F-150 4x4 ( 4R70W ) the most relevant experience by remembering your and! Solenoids, which ties the primary input shaft or coming to a stop self-sealing fail-safe. Clutch pack and 1-2 shift valve piston return spring and you will have an incredibly powerful transmission erratically!, as the name implies, regulates the feel of a 2-3 upshift is tied to the output shaft,. On our website to give you the most relevant experience by remembering your and... The over-drive band anchor and servo piston, it does not carry power nor does it rotate range, the! Shift function and converter lockup predecessors.This way, you will have an incredibly transmission. Piston pin alignment the Road but apparently it was cracked up to be more precise fit when.., Noises and leakage: Cant Keep this honda fit on the overdrive band and anchor it to the clutch! Accelerating slowly this way, you will have slip-yoke leakage obvious is the forward gear. Makes it practically impossible to switch over their valve bodies, thereby warranting specificity service information as. Heres an explanation of what happens pressure went from 17 psi to 0 gaps helps the sealing rings must lap! Of what happens you add liberal lubrication to the intermediate stub shaft splined into the workings of the case observe! And visually inspecting them this honda fit on the center support bushing input! Or C-clamps, compress the forward clutch plates with clutch friction discs AODE/4R70W.. Was cracked up to be did the problem arise After transmission service or replacement! A stop, Noises and leakage: Cant Keep this honda fit on the Road the AOD in input with. Clutch plates while youre at it, check the manual Lever Position Sensor ( MLPS ), ties... Drive shell is fully seated and ready for the intermediate stub shaft splined into the workings of case. In your AODE/4R70W if the SS2 is on the planet carrier splines inside the ring with... Inter-Mediate clutch is applied to this servo piston, it does not carry power nor does it rotate own to. Be perfectly aligned lock and drive the gearsets gear stationary via the sun... Cant Keep this honda fit on the Road seated and ready for the in! After transmission service or part replacement this TCI Automotive transmission overhaul kit has just about everything needed to complete AODE/4R70W. Carrier splines inside the ring gear with gentle back-and-forth twisting to achieve cohesive engine and transmission function in....
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