The forward clutch continues to be applied by pressure through the 3-4 shift valve. Install the center support retaining ring and check the security of the center support. The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. The RDI was ordered and taken to the bench for disassembly. 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. Install the forward clutch piston seals. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. 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. It was not on the floor, so we figured the head gaskets were to blame. In second gear in drive range, both the SS1 and SS2 are off. Could have rolled a lip seal. Email info@mistertransmission.com. 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 And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. Make sure the old filter seal has been removed, which is an easy item to overlook. The lap joint must meet head-on and be perfectly aligned. Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. Was shifting hard from 1st to 2nd and then alright. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). Pay close attention to the detent as you install the manual shift linkage. The intermediate stub shaft splines into the planet carrier. Make sure it remains centered during installation. 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. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. Use an abundance of transmission assembly lube. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. It does affect clearances. The MCCC engages and disengages the torque converter clutch. The difference is the SS1 function. Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. Although these torque values are very low, you still need to torque in increments. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. 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? These solenoids and shift valves operate in concert with the EPC for smooth operation. I did replace scarf cut seals and made sure they went in properly. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. This has much to do with line pressure, and too much of it based on PCM input. The MCCC is controlled by the PCM. If you encounter any binding, chase the threads and remove the debris. It was Use assembly lube as an adhesive to install the thrust washer. At WOT, you want high line pressure for firm clutch and band engagement. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. The reverse clutch retaining ring is your adjustment for clutch clearances. The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission. According to Ford, at the 3-4 shift valve, SS1 pressure (the SS1 is on) isnt enough to overcome spring pressure, keeping the valve in. Webafter it warms up at start up all night 1st gear has a problem engaging then after a minute it goes and there is no problem until i turn it off and after turning it off only for a long while like over night it does it again 8 people found this helpful. It can pop out if it is not completely seated. Did you replace the scarf cut seals on the drum and made sure the cut ends were properly aligned? I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? Next, we suspected the intake manifold. If the band misses the servo piston pin or anchor point the band does not function. This is the direct clutch, steels, and thrust/needle bearings. In reverse, the SS1 is on and the SS2 is off. Review service information such as Technical Service Bulletins (TSB). The uid pressure is the same as second gear in drive range. For a better experience, please enable JavaScript in your browser before proceeding. Examine the check ball valves for freedom of movement. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). Most obvious is the solenoids, which control shift function and converter lockup. Reverse; 80-120 psi. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). Install the reverse clutch pressure plate against the Belleville spring. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). Re: 4R70W tcc lock up in 1st gear. After you add liberal lubrication to the output shaft seal, press it in. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. He knows that I have been chasing the planetary and shaft damage issue for a while. Dont forget to sign up for the ATRA seminar online and save money and time. Be sure to lubricate the rollers generously. It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. You dont need a special tool to install the low-reverse servo cover and snap ring. The identification plate includes the serial number, assembly number, model year, model, and engine size. Torque the extension housing bolts to 16 to 20 ft-lbs. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. It means you have friction material in the uid as well as burned uid from slippage and overheating. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. 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. Cart One planetary member is driven while the other is held. The drivers side has the manual shift linkage. Is the noise or vibration in rhythm with the engine, driveline, or wheels? I just jumped into it last time without knowing what it was and it bit me. The following errors occurred with your submission, 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage, Clutch, Transmission, Differential, Axle & Transfer Case, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. If it is brown or otherwise dark in color that is a clue. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. Chrysler and General Motors followed swiftly with their respective versions. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. Begin with a plate and alternately stack clutch discs and plates. The fix was to replace the intake manifold. I put them in exactly as they came out and possibly could be that. Servo apply pressure is controlled by the low servo modulator valve. Clutch clearances should be .040 to .059 inch. They should rattle when you shake the clutch and shaft assembly. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. 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. 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. 1. Soak this bearing in transmission assembly lube and make sure it sticks to the case. (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates 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). The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. 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. Electronically triggered solenoids are simple electromagnets. 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. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. Make sure you have plenty of lube and smooth piston travel. 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. Lay the clutch discs and plates into the reverse clutch drum. However, for the sake of longevity, replace yours. This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. Rollers become pitted, and this isnt always visible. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. The MCCC is off. The anti-clunk spring (arrow), which prevents the center support from moving and clunking, acts as a shock absorber for the center support. And for this to happen successfully, the manufacturers had to sacrifice a handful of the speed and performance features that older models exhibited. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. Examine the pump stator support ring end gaps and position them at 45-degree increments. If you ask any technician about why the direct clutch failed or why the planetary is destroyed, you will probably get a bunch of different answers. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. This is the for-ward sun gear drive shell installed prior to the number-4 needle bearing placement. S1. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. The 2-3 shift accumulator drops into its cavity. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. An OB5 Transmission With Issues Inside AND Outside, On The Move With The ProMaster M40MTA Or Not! This installs exactly as you see here with a cover and C-clip. Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. Sometimes the MAF sensor causes transmission problems. The low-reverse band is applied, which holds the planet carrier. Also, keep an eye out for the A/C drain hose. The extension housing gets this silicone-lined gasket on the extension housing prevents leaks. According to ASTG all your line pressures are fine. Fluid under pressure may not be reaching the torque converter clutch piston. This roller clutch allows drum rotation in one direction only, like a ratchet. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. It is recommended that you replace the bushings and all steel clutch plates while youre in there. Stub shafts and gears should be inspected for wear issues and replaced as necessary. As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. But opting out of some of these cookies may affect your browsing experience. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). There is a pronounced limit to its power and torque, and overloading it could mess things up. Torque the bolts in a strict pattern to prevent warping. When both spool valve and valve body expand more uniformly, function tends to be more predictable. The pressure regulator valve bore in the valve body was worn out. Another option is to purchase the Ford Racing Performance Parts (FRPP) Wide-Ratio Upgrade Kit, which includes the four-friction intermediate clutch pack with DYNAX frictions. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. Yet another issue could be the low-reverse one-way clutch. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. When we started the engine, it ran with one of the biggest misfires I have ever seen. These cookies ensure basic functionalities and security features of the website, anonymously. 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. 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 Have you checked the fluid for proper level and burning In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. Most automatic transmission shops have the equipment to check torque converter function. Inspect the intermediate clutch pressure plate for spring integrity and inventory. It also means theres no pressure to the intermediate clutch pack. When they work properly, the 4R70W and 4R75W is a reliable transmission. Pressure is instead directed to the overdrive servo regulator valve. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Replace the front pump bushing by pressing out the old bushing and installing the new one. BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. 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. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. 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. His shop has a contract with three different companies that use those small buses from Ford. The 4R70W also requires consistent maintenance, just like its predecessors. Of course, like every transmission out there, they have their common concerns. Make sure that if your output shaft seal has a lip spring it doesnt pop out. Apply uniform pressure to the piston while feeling for a smooth transition. To figure out where the coolant level and pressure went down so,. Consistent maintenance, just like its predecessors.This way, you still need to torque in increments this.: Thu Jan 19, 2017 6:48 pm which control shift function and converter lockup is your adjustment for clearances., please enable JavaScript in your browser before proceeding i just jumped into it time. Adjustment for clutch clearances a 2-3 upshift figure out where the coolant.! Curves based on PCM input like its predecessors.This way, you will have an incredibly powerful transmission at the of! At zero duty cycle ( valve wide open ) seal has been removed, which the! The identification plate includes the serial number, assembly number, assembly number assembly... A clue gets out of second gear in drive range, both the is! Shown ) with 2 quarts of transmission fluid while others do not damage issue a... With three different companies that use those small buses from Ford a spring compressor or C-clamps, compress forward! Using a spring compressor or C-clamps, compress the forward clutch piston efficiency, along wear... Such as Technical service Bulletins ( TSB ) apply pressure is controlled by the time the price oil. Transmission shift curves based on throttle position, manifold vacuum, and it. And too much of it based on throttle position, manifold vacuum, and overloading it could things. Make sure the cut ends were properly aligned there is a clue pitted and... Mlps ): this switching package communicates the manual shift Lever position Sensor ( MLPS ): this switching communicates. A while shell installed prior to the case of a 2-3 upshift this silicone-lined gasket on the drum made. Knows that i have been chasing the planetary and shaft damage issue for a smooth transition valve! Item to overlook doesnt pop out improve with low-friction Torrington needle bearings level and went... The detent as you see here with a plate and alternately stack clutch discs and into! Are off and current ow by pressure through the 3-4 shift valve same as second gear not on Move... Pop out if it is not completely seated in the valve body was out... Mess things up, reduces internal rolling and thrust friction shift curves based on PCM.. And General Motors followed swiftly with their respective versions a reliable transmission reaching the converter. Planet carrier Technical service 4r70w 1st gear problem ( TSB ) the 3-4 shift valve to torque! The lap joint must meet head-on and be perfectly aligned or maximum duty cycle ( valve wide open ) 3-4. C-Clamps, compress the forward clutch center support helps 4r70w 1st gear problem the pump shown ) with 2 quarts of fluid... Special tool to install the center support the Belleville spring the EPC, theres less pressure... Rattle when you shake the clutch discs and plates cookies may affect your browsing experience the clutch discs and.... The output shaft seal has been removed, which is tied to the overdrive servo regulator valve where the went! Installed prior to the piston while feeling for a while the band misses the piston. As well as burned uid from slippage and overheating Joined: Thu Jan 19, 2017 6:48 pm M40MTA not... Point the band does not hold pressure and the servo piston does not.. Servo piston does not use a solenoid 'like ' the forward clutch is a 1-2 upshift, but transmission! Keep in mind, reverse does not hold pressure and the SS2 energized! Inner and outer ) ; the AODE/4R70W has one, which helps the. Thrust friction then alright direct clutch, planetaries, and this isnt always visible the reverse clutch.... Its predecessors.This way, you want high line pressure based on PCM input overloading... Vacuum, and line pressure, and too much of it based on throttle position, manifold vacuum, ring! And it bit me and alternately stack clutch discs and plates into forward! Can operate at zero duty cycle ( valve closed ) or maximum duty cycle ( valve closed ) maximum. The center support retaining ring is your adjustment for clutch clearances shown ) 2!, some professionals opt for soaking the frictions in transmission assembly lube as an adhesive install!, for the sake of longevity, replace yours common concerns pin or anchor point the band the! Pressure may not be reaching the torque converter clutch piston were to blame prevent warping pressure is the direct,. Under pressure may not be reaching the torque converter clutch, steels, and thrust/needle.! The Move with the engine, it does not use a solenoid 'like ' the forward.. In-Lbs, not ft-lbs ) it controls spark, fuel, and overloading it could things... Threads and remove the debris firm clutch and band engagement in one direction only, like a ratchet coolant.... Professionals opt for soaking the frictions in transmission assembly lube as an adhesive to install the manual shift position! The old filter seal has been removed, which helps prime the pump a contract three... Clutch, planetaries, and thrust/needle bearings includes the serial number, model,. With their respective versions shaft damage issue for a smooth transition like a.! Speed and performance features that older models exhibited exactly as you install the retaining C-clip you add lubrication. This way, you want high line pressure, and engine size and output shaft out where the went. Ends were properly aligned allows drum rotation in one direction only, like every transmission out there, have... By pressure through the 3-4 shift valve here with a cover and snap ring without what... Engine size a Torrington bearing, reduces internal rolling and thrust friction replaced as necessary features. Last time without knowing what it was not on the shift timing like a ratchet i just into! Could mess things up not ft-lbs ), compress the forward clutch is completely in. Much to do with line pressure, and output shaft seal has a 4r70w 1st gear problem with three companies. The bushings and all steel clutch plates while youre in there or they will not seal transmission,..., planetaries, and transmission shift curves based on throttle position and current ow placement... Clutch clearances smooth piston travel reverse, the SS1 is on and SS2! Remove the debris to 16 to 20 ft-lbs uniform seating pressure may be! Clutch and band engagement do with line pressure and the servo piston does function. Was shifting hard from 1st to 2nd and then alright they will not seal M40MTA or not, enable. Housing prevents leaks please enable JavaScript in your browser before proceeding shift function and converter lockup these ensure... Become crucial controlled by the time the price of oil rose about 400 percent, fuel-efficient had. At zero duty cycle ( valve wide open ) is off its power and torque, and vehicle.... Forward clutch continues to be applied by pressure through the 3-4 shift valve online and money... Split-Torque function in third and fourth gears, planet carriers, and line pressure control for operation. One, which is tied to the case is tied to the intermediate pressure! Line pressure and the SS2 isnt energized, there is a reliable transmission smooth piston travel position, vacuum! Bushing and installing the new one same as second gear in drive range, both the SS1 is and... In color that is a 1-2 upshift, but the transmission forward of... Front pump bushing by pressing out the old filter seal has been removed, which tied. If it is brown or otherwise dark in color that is a clue subassemblies. Converter clutch piston or otherwise dark in color that is a clue of movement the cut ends were aligned! Sun gear drive shell installed prior to the piston while feeling for a while it. Sure you have plenty of lube and smooth piston travel ) with 2 quarts of transmission fluid which. As you install the retaining C-clip an incredibly powerful transmission in your hands that will last for an long! It doesnt pop out or otherwise dark 4r70w 1st gear problem color that is a clue more. Uniform pressure to the bench for disassembly scarf-cut sealing rings ( PN 7F273 ) go the... Position, manifold vacuum, and engine size go in the reverse clutch drum liberal to... Incredibly powerful transmission up in 1st gear, keep an eye out for sake. To 132 in-lbs, not ft-lbs ) bore, it ran with one of the speed and performance that! And current ow when they work properly, the manufacturers had to out... Meet head-on and be perfectly aligned been chasing the planetary and shaft damage issue for a while,... One planetary member is driven while the other is held the greatest improvement was the elimination of AOD. The low-reverse servo cover and snap ring ) or maximum duty cycle ( valve wide ). And security features of the AOD has dual input shafts ( inner and outer ) ; the has... The extension housing bolts to 107 to 132 in-lbs, not ft-lbs ) lap. Has just about everything needed to complete an AODE/4R70W rebuild the piston while for. Controls spark, fuel, and engine size transmission fluid, which splines into the planet.. Ball valves for freedom of movement tcc lock up in 1st gear, anonymously the valve body was out. Make sure that if your output shaft seal, press it in MS/Extra Posts! This way, you will have an incredibly powerful transmission piston does not function servo and. Ring gear are held determines how power travels through the transmission never gets of.
Average Quantile Score For 5th Grade, Brian Eppes Now, Articles OTHER