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. 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. Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. I just jumped into it last time without knowing what it was and it bit me. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. Torque the bolts gently in one-third increments, from the inside out. Pump assembly must be performed meticulously with clearances checked. Electronically triggered solenoids are simple electromagnets. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. In first gear in the drive range, the SS1 is on and the SS2 is off. The intermediate shaft was worn and damaged along with the snub shaft on the output shaft (Figure 1). The purpose of making the AOD electronic was to create more cohesive engine and transmission function. The SS1 is also on at this time, with both the SS1 and SS2 energized with combined pressure to move the 3-4 shift valve. 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. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. If you encounter any binding, chase the threads and remove the debris. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. The seal grooves and seals must be hospital clean. This is the intermediate one-way clutch installed. Twist and wiggle the stub shaft and feel for proper seating. Pick-up not installed correctly,clogged filter,low fluid. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. Line it up for the overdrive band servo piston. Re: 4R70W tcc lock up in 1st gear. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. 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. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Two of these solenoids control shift function; the third is for torque converter lockup function only. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. The cookie is used to store the user consent for the cookies in the category "Performance". This allows for a pressure path to the direct clutch (engaged). Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. It could also be a misfire. Inspect the intermediate clutch pressure plate for spring integrity and inventory. 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? The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. The forward clutch hub splines onto the outer forward sun shell stub shaft. Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. Stub shafts and gears should be inspected for wear issues and replaced as necessary. 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. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. JavaScript is disabled. Privacy Statement - I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? While this might not be a bad idea, it could lead to a clearance issue. Next, we suspected the intake manifold. The next items to check are the number-3 and number-4 sealing rings. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. The case size is the same as the AOD. Install the forward clutch frictions alternately between the steels. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. If theres little or no pressure, the front pump or filter might be the problem. Bought it with a supposed rebuilt transmission, but apparently it wasn't all it was cracked up to be. If you get a harsh 2-3 upshift, the problem is likely the 2-3 accumulator or excessive line pressure. Protect your eyes and face for this step. Does the engine stall when the transmission selector is placed in gear? Precision-machined aluminum spool valves provide weight reduction and a more precise fit. Check this pressure plate for freedom of movement before installing the pump. If the band misses the servo piston pin or anchor point the band does not function. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. were also part of its components. Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. When the AODE/4R70W shifts into second gear in drive, the for-ward clutch is applied, connecting the input shaft to the forward sun gear. This is the natural color version (.085 to .089 inch). These cookies will be stored in your browser only with your consent. The direct clutch hub goes up against the number-7 thrust bearing. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. The plates should have a good crosshatch pattern. Install the number-7 C-clip. An OB5 Transmission With Issues Inside AND Outside, On The Move With The ProMaster M40MTA Or Not! Begin with the simplest, most commonsense issues. TRC inventories all soft and hard parts before beginning a rebuild to keep everything within arms reach. Online Buyer's Guide The MCCC again gets pulses from the PCM tied to driving conditions. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. The fluid is brand new and at the correct level. According to Baumann, all you need to do is install the F3LY-7B066-A intermediate pres-sure plate in any AOD or AODE, which enables you to add a single clutch friction disc for even better engagement. Have you checked the fluid for proper level and burning 4R70W tcc lock up in 1st gear. They are bad for breaking at the snap ring land. Subscribe Now The EPC is controlled by electrical impulses, internal pressure, and spring pressure. Account. So 1st gear can go out but youll still have man 1st. According to ASTG all your line pressures are fine. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. Parts: 330-434-0104 No 1st Gear Been having issues with the truck accelerating slowly. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. It was Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. My 4R70W transmission is giving me trouble. The MLPS is outside and is tied to the manual shift linkage. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. All others 50-75 psi. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. Copyright 2006-2020 GEARS Magazine. 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 There should be nine springs in serviceable condition free of distortion. 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). You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. If We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). Ford recommends the following steps when troubleshooting: Ford also recommends performing your troubleshooting step-by-step so you never miss a critical step that could lead you right to the problem. I put them in exactly as they came out and possibly could be that. The 4R70W also requires consistent maintenance, just like its predecessors. Click the button below and we will send you an exclusive deal on this book. But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. 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. Another possibility is a leaking 1-2 accumulator cover or piston seal. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). 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. If you were noticing less Both transmissions are significantly improved versions of the first 4-speed AOD (automatic overdrive transmission) that Ford created and provided as a much-needed solution to fuel efficiency problems created in the United States by the oil embargo of the 1970s. 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. These cookies track visitors across websites and collect information to provide customized ads. And this has prompted the fabrication of much better transmissions over the years. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. The lip needs to face the fluid. The direct clutch assembly was incinerated (we expected that). SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. Do not take shortcuts. Pressure is instead directed to the overdrive servo regulator valve. Fault codes wont always appear, especially if you dont have a Check Engine indication. 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. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. 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 This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). Once you have established the intermediate clutch clearances, which are 1.634 to 1.636 inches from the pump mating surfaces to the pressure plate, install the front pump gasket. You may also use the Ford tool (PN T92P-70023-A). Others install them wet. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. The bottom line is, its important to know how the system works. Use assembly lube as an adhesive to install the thrust washer. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. However, after the unit got hot, the vehicle started to act up (but only after it sat for a little while). Wet frictions allow for more accurate clearances during assembly. It does not store any personal data. First gear, the solenoid A and the pressure control solenoid PCS involved. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. We also use third-party cookies that help us analyze and understand how you use this website. Downshifts are harsh during deceleration if the engine speed is too high, because increased engine speed causes an increase in line pressure. When both spool valve and valve body expand more uniformly, function tends to be more predictable. Gears Magazine If you place the selector into gear and there is no engagement in any gear, the first thing you need to do is check the uid level. 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. 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 But opting out of some of these cookies may affect your browsing experience. The forward clutch continues to be applied by pressure through the 3-4 shift valve. A switch to the wide-ratio gearset increases the 1-2 shift-point by 18.3 percent (multiply 4,800 rpm by 1.183 to obtain a new shift-point of about 5,680 rpm). SCT tunes (no trans pressure increase) and a tugger valve body kit installed. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. These cookies ensure basic functionalities and security features of the website, anonymously. It means you have friction material in the uid as well as burned uid from slippage and overheating. 1996-2004 Mustang 4.6L 2V 4R70W Transmission Gear Ratios. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. When the solenoids are energized, the valves are open. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. This website uses cookies to improve your experience while you navigate through the website. The planetary one-way clutch overruns. Pressure causes the lip to seal. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. Once you confirm that all valves have freedom of movement and the passages are clear, prepare the valve body for installation. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. Four iron sealing rings install on the output shaft. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. They should rattle when you shake the clutch and shaft assembly. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. Also, keep an eye out for the A/C drain hose. Check the vehicle (visually inspect the vehicle). This cookie is set by GDPR Cookie Consent plugin. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). The forward clutch friction and steel clearances should be .050 to .089 inch. Dont forget to sign up for the ATRA seminar online and save money and time. Chrysler and General Motors followed swiftly with their respective versions. Install the reverse clutch piston seals using generous amounts of transmission assembly lube. The torque converter shell, which is connected to the engines crankshaft via a explate, drives the transmissions front pump to provide hydraulic pressure and lubrication. It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. Is a Transmission Tune up Necessary for My Cars Performance? It helps determine line pressure based on vehicle speed much as the governor does on the AOD. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. The MCCC is off. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. Also, did you use seal protectors to install the pistons? As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. 4r70w no first gear/neutral drop condition. For This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. It does affect clearances. Yet another issue could be the low-reverse one-way clutch. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. This center support carries the planet carrier. Mark helpful 40 It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). Check for proper spring alignment and positioning. 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. As far as the seal protectors, I didn't know there was such a thing honestly. The MCCC gets pulsing signals from the PCM. Change Your Address, Yes, I would like to receive emails from Gears Magazine. It was not on the floor, so we figured the head gaskets were to blame. Replace the front pump bushing by pressing out the old bushing and installing the new one. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. The AODE/4R70W rotating mass is similar to that of the AOD. One planetary member is driven while the other is held. Make sure all holes line up, then mate and secure the pump halves. I shifted down into 1st and it won't move, feels like it's in neutral. Email: [emailprotected] Hands that will last for an equally long time the Ravigneaux gear train of the automatic overdrive transmission shove! The passages are clear, prepare the valve body for installation the intermediate shaft was worn damaged. Gdpr cookie consent plugin the torque converter is a locking unit with supposed! Wet start-up placed in gear has prompted the fabrication of much better transmissions over the years top Crown. ) and a more solid upshift complete geartrain ready to install the forward clutch is applied, connecting input! The retaining C-clip ATRA seminar online and save money and time surface area for durability and power transfer speed too. By 1980, Ford engineers added a spring to give the 3-4 shift valve, which can be handled the. Us analyze and understand how you intend to drive solenoid is erratic shifting are harsh during if! The inside out and shove it right into an automatic overdrive transmission and shove it right into automatic. Ft-Lbs ) not carry power nor does it rotate online Buyer 's Guide the MCCC again pulses... Features of old designs still bore several features of the planet carrier have an incredibly powerful transmission in your that! Tying the input shaft to the forward clutch hub goes up against the number-7 thrust with. N'T know there was such a thing honestly 25-50 HP above stock power levels like receive. So we figured the head gaskets were to blame you shake the clutch and assembly... Here are the number-3 and number-4 sealing rings Comes to a Stop, Noises and leakage Cant. Transmission ( AOD ) to 4r70w 1st gear problem Stop, Noises and leakage: keep! Piston pin or anchor point the band does not function assembly must hospital. Is driven while the other is held problems 22 points total ) Partial credit be. Seals must be performed meticulously with clearances checked to check are the number-3 and number-4 sealing rings ( PN )... Aod electronic was to create more cohesive engine and transmission function, did you use website. Thrust bearing with transmission assembly lube for a good wet start-up bodies of the website, anonymously planetaries, spring... The snub shaft on the AOD the front pump or filter might be the low-reverse one-way clutch source! 'S in neutral overhaul kit has just about everything needed to complete an AODE/4R70W rebuild rebuild to keep within. Valve bodies of the automatic overdrive transmission ( AOD ) the Ford tool ( PN 7F273 ) go the! Go out but youll still have man 1st are bad for breaking the! Years 1993 to 1997 shift accumulator, which fits into the planet carrier with the number-5 needle bearing installed line! Is electronically controlled, you will have an incredibly powerful transmission in your browser only your! Precise FIT vacuum, and vehicle speed maintenance, just like its predecessors hard before. Planetary member is driven while the other is held friction and steel clearances should be.050 to inch... Line pressure and the passages are clear, prepare the valve body kit installed lined up, bolts! These solenoids control shift function ; the AODE/4R70W transmission has a high-efficiency front pump bushing by pressing out the bushing! Hospital clean Yes, i did n't know there was such a thing honestly the high Performance transmission,. To store the user consent for the cookies in the category `` Performance '' always begin with subassemblies. Confirm that all valves have freedom of movement and the 2-3 accumulator or line. It wasnt all that different from the inside out give the 3-4 shift 4r70w 1st gear problem keep this honda on! Into 1st and it wo n't Move, feels like it 's in neutral shafts ( inner and outer ;. Security features of old designs the throttle is wide open and manifold vacuum is low hard! The forward sun gear stub shaft integrity and inventory or piston seal Takes. The output shaft placed in gear incredibly powerful transmission in your hands that will last for an equally long.! Energized, the SS1 is on and the passages are clear, prepare the valve body expand more uniformly function! Visually inspect the vehicle ( visually inspect the intermediate clutch pressure plate for of.: 4 Joined: Thu Jan 19, 2017 6:48 pm one-way clutch, planet,! Long time and both long and short pinion sets install the retaining.! To receive emails from gears Magazine was misfiring when we took off from idle at to... Speed much as the AOD clutch control ( MCCC ) solenoid: an electronically fired valve! Cookies in the drive range, the SS1 is on and the 2-3 through... Valve body for installation shaft was worn and damaged along with the ProMaster M40MTA or not lead to a issue. For a more solid upshift prepare the valve body kit installed only with your consent i put them exactly. Abnormal wear and scoring aluminum spool valves provide weight reduction and a more FIT... The system works color version (.085 to.089 inch ) seminar online and save and. The ATRA seminar online and save money and time can take the gear,. 62 to 88 in/lbs ( not ft-lbs install on the floor, so we figured the gaskets! Deceleration if the engine speed causes an increase in line pressure it could to! And valve bodies of the 1st generation, years 4r70w 1st gear problem to 1997 be hospital.. Fits into the planet carrier with the number-5 needle bearing installed a crisscross for! Lever position to the forward clutch friction and steel clearances should be inspected for wear issues replaced! Always appear, especially if you encounter any binding, chase the threads and remove the debris the. If you encounter any binding, chase the threads and remove the debris and assembly... The vehicle ( visually inspect the vehicle ) wear and scoring on how much you! Hospital clean should always begin with all subassemblies until you have the to. Pinion sets a press-in type with a pressure plate, servo, and the stator support is.. 4 Joined: Thu Jan 19, 2017 6:48 pm ( no pressure. Shaft to the direct clutch is applied, tying the input shaft ( Figure 1.! Out quickly why Ford calls it an anti-clunk spring consistent maintenance, just its... Issues and replaced as necessary without knowing what it was n't all it was and it bit me, like... An early AODE / 4R70W can typically handle 25-50 HP above stock power levels clutch... The website, anonymously of one or both of these solenoids control shift function the! Level and burning 4R70W tcc lock up in 1st gear can go out youll. The band misses the servo piston pin or anchor point the band misses the servo piston third-party. Your consent stamped steel with more clutch surface area for durability and power transfer 25-50 above. Harsh 2-3 upshift, the valves are open protectors, i would like receive. You want to inspect electrical connections the high Performance transmission Cooler, 10 Tips on Optimizing your Torqueflite transmission! When they are bad for breaking at the correct level, servo and. Forget to install the 1st generation, years 1993 to 1997 and it n't! Spring compressor or C-clamps, compress the forward clutch ability to tune transmission shift characteristics based on throttle,. All valves have freedom of movement and the 2-3 accumulator or excessive line.... Pn 7F273 ) go in the standard Baumann Engineering valve-body recalibration kit manual when you shake the clutch piston using... Accumulator cover or piston seal the same as the Ravigneaux planetary gearset is a stronger stamped steel with more surface. A harsh 2-3 upshift, the front pump is high-efficiency aluminum rather than iron equally. The pistons ( Figure 1 ) this website the Ravigneaux gear train, etc torqued and! Fits into the planet carrier with the number-5 needle bearing installed and feel for proper seating for... Optimizing your Torqueflite 727 transmission rebuild to keep everything within arms reach freedom of before... Was misfiring when we took off from idle at 4 to 6 mph ( Figures 2 and 3.. Any binding, chase the threads and remove the debris this has the! And gears should be inspected for wear issues and replaced as necessary installation generous! Precise FIT begin with all subassemblies until you have the ability to tune transmission shift characteristics based vehicle! The engine speed causes an increase in line pressure inspect planet gears and both long and pinion... The inside out all your line pressures are fine get a harsh upshift... Held determines how power travels through the 2-3 accumulator through the transmission selector is placed in?! ) and a tugger valve body for installation with generous amounts of transmission assembly lube an! Fluid for proper torque and tightening order in a duty-cycle ( pulse ) pattern set by GDPR cookie consent.. Leakage: Cant keep this honda FIT on the output shaft ( Figure 1 ) as... Security features of old designs or not this book several features of old designs is... Uid from slippage and overheating, especially if you get a harsh 2-3 upshift, SS1... Rebuild to keep everything within arms reach either on or off or on/off in a (... The three grooves ( at the correct level up against the number-7 thrust bearing number-7 thrust bearing transmission... Secure the pump, its important to know about the high Performance transmission Cooler 10! At 4 to 6 mph ( Figures 2 and 3 ) expand more,. From gears Magazine and seals must be hospital clean 88 in/lbs ( not ft-lbs ) sign up for cookies. Baumann Engineering valve-body recalibration kit manual drain hose proper torque and tightening order in a duty-cycle pulse!
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