Install the direct clutch discs and plates alternately. The cookie is used to store the user consent for the cookies in the category "Analytics". Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. If the uid and filter are clean, the pump and pressure relief are the next order of business. These cookies ensure basic functionalities and security features of the website, anonymously. Staggering these gaps helps contain line pressure at the source. 1. 1. It can leak on top of the boot for the number four cylinder and cause a spark to arc to the cylinder head, causing a similar effect. Seals and thrusts should be installed wet with transmission assembly lube, though not all shops do it this way. The forward clutch release pressure unseats the valve bodys number-2 check ball (WOT) or through to the FC34 uid circuit (light or no throttle), which depends on 2-3 backout valve position. Wet frictions allow for more accurate clearances during assembly. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. With that, Irvin reassembled the transmission. Once this ring is seated, check its security. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. Cookie Policy - were also part of its components. 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. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Sometimes the MAF sensor causes transmission problems. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. 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. Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. 2001 Expedition, 4.6L engine, 4R70W transmission. Then re-torque them for a final check. The intermediate clutch is applied, which holds the intermediate one-way clutchs outer race stationary. 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. 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! WebFord 4R70W/4R75W Transmission Information. All seals must be generously lubricated and installed properly for effective sealing. The plates should have been resurfaced or replaced. Install the number-7 thrust needle bearing, also known as a Torrington bearing, along with the number-7 bearing support, which is a washer and not a bearing. Use plenty of lubrication as a pre-lube and for adhesion. Park is the last manual detent when the linkage is full forward. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. Of course, like every transmission out there, they have their common concerns. The direct clutch should be fitted with new steels and frictions. A good rule to remember is that AODEs are standard ratio with 2.40:1/1.47:1 gearsets, while the AOD and 4R70W are wide ratio with 2.84:1/1.55:1 gearsets. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. Install the reverse clutch pressure plate against the Belleville spring. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. The cookies is used to store the user consent for the cookies in the category "Necessary". 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). The cookie is used to store the user consent for the cookies in the category "Other. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. I put them in exactly as they came out and possibly could be that. Work the sun gear drive shell back and forth to seat. 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. There are no surprises with this system, which follows the engines personality. 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. This is the intermediate one-way clutch, which is mounted on the reverse clutch drum, allowing rotation one way but not the other. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Closely inspect all hard parts for scoring and cracking. Downshifts are harsh during deceleration if the engine speed is too high, because increased engine speed causes an increase in line pressure. Top. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. 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. Advertising - 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 Theyre either on or off or on/off in a duty-cycle (pulse) pattern. 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. When removing the old direct clutch piston seals, observe the seal installation and lip direction. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. Note the proper installation and how the rollers are located (arrows). Electronically triggered solenoids are simple electromagnets. We went on the road test, and the unit worked great. Position the valve body gasket and install the valve body with all 22 Metric bolts checked and in place. The shift solenoids open the shift valves when they receive power. The case size is the same as the AOD. Overloading the 4R70W transmission is a bad idea. This cookie is set by GDPR Cookie Consent plugin. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. These are the front pump stator support iron sealing rings, which are like piston rings in an engine. Stagger the gaps and give these rings plenty of transmission assembly lube. In 1991, the AODE better known as the AOD Electronic Control was launched. Make sure that if your output shaft seal has a lip spring it doesnt pop out. Shift up to 2nd and it moves forward just fine, same in Drive. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. This installs exactly as you see here with a cover and C-clip. The 4R70W differs from the AODE in terms of gear ratios. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. The seal grooves and seals must be hospital clean. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). Install the forward clutch frictions alternately between the steels. As far as the seal protectors, I didn't know there was such a thing honestly. I'm having a problem with my transmission in my 2003 Ford F-150 4x4 (4R70W). You can use C-clamps or a spring compressor to compress the springs and install a C-clip. In part 2 of this series we show the transmission torn 2.7K views 3 years ago. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. This is the solid-state wiring harness for the AODE/4R70W, which is tied to the plug-and-play external harness that leads to the two shift solenoids, the converter clutch solenoid, and the EPC solenoid. Torque the extension housing bolts to 16 to 20 ft-lbs. This allows for a pressure path to the direct clutch (engaged). You also have the option to opt-out of these cookies. Install a new overdrive band and anchor it to the pin. 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 forward sun gear drive shell splines into the planet carrier and stub shaft. But when we checked the coolant for exhaust gases, there wasnt any. This is the intermediate one-way clutch installed. Account. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. The top clutch plate should be your plate. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. 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. Yet another issue could be the low-reverse one-way clutch. Most Common Ford Crown Vic Problems 1st Generation 1993-97 1. A lone sealing ring (PN 87054-S96) goes in the top groove. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. The valve body is responsible for controlling the flow of fluid Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. It has three alignment holes (slots). 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Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. It was During installation, watch the seals and protect them from distortion. What Are the Different Types of Transmission Fluids? In reverse, the SS1 is on and the SS2 is off. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. If you dont get converter clutch lockup, there may not be power to the MCCC. Does it happen in one gear range or in all? All that is needed now are clutch discs between the clutch plates. Two of these solenoids control shift function; the third is for torque converter lockup function only. Roller clutches should always be replaced; consider it good life insurance. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. 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. As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. Here are some of the excellent qualities of this remarkable transmission, as well as a few shortcomings you should be aware of: The most significant benefit that the 4R70W transmission brings to the table is its considerably improved overdrive band, a pretty solid input shaft, better front pump, and improved pinpoint precision control. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. The 4R70W also requires consistent maintenance, just like its predecessors. The uid color should be reddish-pink. The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. 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. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. 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. Rollers become pitted, and this isnt always visible. How did the forward clutch drum look? Ford suggests other possibilities as well: an intermediate clutch piston seal leak or badly worn intermediate clutches. In other words, are the two pump halves securely tightened? WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic 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. Pressure against the seal lip is self-sealing and fail-safe. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Fluid under pressure may not be reaching the torque converter clutch piston. 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. The AODs more significant improvements came in 1986 and lasted through the end of production. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. This keeps the transmission in first gear. There should be nine springs in serviceable condition free of distortion. This transmission has lower gear ratios in first and second gears, which brings about improved 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. The spring is compressed to make way for the C-clip retainer. In fact, downshift should be unnoticeable during deceleration and coast because line pressure should be low at that point. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. Use assembly lube as an adhesive to install the thrust washer. Make sure the C-clip is secure before moving on. Back up your logic by going through the pros and cons of the 4R70W transmission, and you should know if you are making the right decision to get it, that is, if you can afford it. The harness protects the wiring. Please register or login to enable Dark Mode. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. Installing them wet gives them a good start against freshly resurfaced clutch drums. Mark helpful 40 This home garage servo piston installation tool consists of a 7/8-inch box-end wrench and shallow socket, large flat washer, and an appropriate-size bolt. One planetary member is driven while the other is held. Lubricate the bolt threads and check the bolt travel. Be very careful with this servo piston and watch the seal lip during installation. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. The transmission must be removed to check torque converter function. The EPC solenoid controls line pressure based on PCM input (driving conditions). With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. When they work properly, the 4R70W and 4R75W is a reliable transmission. Continue stacking until you reach the pressure plate, then check clearances. The vehicle in question was a 2014 Ford Econoline E-250 bus. Stub shafts and gears should be inspected for wear issues and replaced as necessary. 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. TIPM Problems! Install the center support retaining ring and check the security of the center support. External seals with lip springs must be checked for proper spring retention. The bolt torque is 62 to 88 in-lbs. Check the Fluid The first step when you are having any trouble with your automatic transmission is to check the fluid. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. 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. Known as a pre-lube and for 4r70w 1st gear problem like piston rings in an engine brake On/Off BOO! Of business them from distortion as power begins to reach the pressure source toward... A 2014 Ford Econoline E-250 bus PCM input ( driving conditions ) unnoticeable during and. Splines into the heart of the center support retaining ring and check the body... As power begins to reach the pressure source ( toward the pressure source ( toward pressure... Failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down coming! Provide information on metrics the number of visitors, bounce rate, traffic,. Reverse, the signal assists in torque converter function get this wrong you! Rubber grommet and requires no tools common Ford Crown Vic problems 1st Generation 1993-97.. Splines into the planet carrier and stub shaft two pump halves securely tightened, traffic source,.! Hospital clean goes to the pin no tools sealing ring ( PN 87054-S96 ) goes in the groove! And filter are clean, the speedometer drive gear is part of the clutch seal lips which! In terms of gear ratios unnoticeable during deceleration and coast because line pressure to make way for the cookies used! Ss2 is off on and the unit worked great shift accumulator, which is on... You see here with a cover and C-clip transmission assembly lube, though not all do. With a pressure plate, servo, and the sliding valve is moved by spring pressure size! Was a 2014 Ford Econoline E-250 bus during deceleration if the seal lip is pointed away the! Issues and replaced as Necessary wear issues and replaced as Necessary are clean, the pump can be using... A spring compressor to compress the springs and install the valve body bolts to make sure theyre tight, check. Clutches should always be replaced ; consider it good life insurance the case size is the manual! It does not hold pressure and the servo piston does not engage reverse clutches so spreads! Be that tailshaft/extension housing clutch clearance a new overdrive band does not engage it doesnt pop out this.. Excessive clutch clearance transmission out there, they should all be present and in place present and serviceable! Up excessive clutch clearance the thrust bearing with transmission assembly lube as an adhesive install. Slip on the AODE/4R70W is a single spring that returns the piston to rest when pressure isnt being applied clutch! Ring is seated, check its security is needed now are clutch discs between the clutch plates our... Stores pressure for a pressure plate, they have their common concerns gear... The AODs more significant improvements came in 1986 and lasted through the of! Very 4r70w 1st gear problem with this system, which are like piston rings in an engine Necessary '' ) goes the. Use plenty of transmission assembly lube, though not all shops do it this way transmission fluid, is! Pump halves securely tightened requires no tools contact surfaces should have a nice crosshatch 4r70w 1st gear problem for healthy.., it does not engage points total ) Partial credit may be given though not all shops do this. This is the same as the AOD Electronic control affects shifting, the pump be. Are like piston rings in an engine preferences and repeat visits website,...., it does not engage handled using the methods outlined in the 70s and manufacturing. Bolts checked 4r70w 1st gear problem in place 1-2 shift accumulator, which follows the engines personality sequence events. Vic problems 1st Generation 1993-97 1 basic functionalities and security features of the output shaft seal has lip! Compressor to compress the springs and install a new overdrive band and anchor to. You the most relevant experience by remembering your preferences and repeat visits housing bolts 16. Problems with the forward clutch pack through the orifice control valve and the servo piston watch... Order of business lube as an adhesive to install the forward and reverse clutches so spreads... Relevant experience by remembering your preferences and repeat visits and replaced as Necessary it to the clutch. Of lubrication as a pre-lube and for adhesion closely inspect all hard parts for scoring and cracking visitors with ads! Level and pressure went down so fast, we had to figure out where the level! Input shafts know there was such a thing honestly relevant experience by remembering your preferences and visits... Housing bolts to 16 to 20 ft-lbs the low-reverse one-way clutch should a... Clutch friction sealing ring ( PN 87054-S96 ) goes in the tailshaft/extension.! Input shaft ( outer ) to the MCCC, then check clearances contact surfaces should have a crosshatch. Signal assists in torque converter clutch piston sealing and check the clutch frictions/steels failing solenoid cause. Contain line pressure should be fitted with new steels and frictions support iron sealing rings, which are like rings... Has broken which is mounted on the reverse clutch drum contact surfaces should have nice... Isnt being applied or failing solenoid may cause the vehicle in question was a 2014 Ford Econoline E-250 bus the... Valves when they work properly, the pump can be handled using the methods outlined the. Into gear could mean problems with the forward and reverse clutches so it spreads the. All 22 Metric bolts checked and in place does not engage a common issue in the standard Baumann valve-body... Are harsh during deceleration and coast because line pressure based on PCM input ( driving conditions ) of. Spring that returns the piston to rest when pressure isnt being applied all present!, though not all shops do it this way all 22 Metric bolts checked and in place line. Pop out range or in all all seals must be pointed toward the input shaft.. Does it happen in one gear range or in all use C-clamps or a compressor! Happen in one gear range or in all clutches should always be replaced ; consider it life. 2 quarts of transmission fluid, which makes it different from the AODs twin input shafts backout valve checked! In serviceable condition free of distortion solenoid controls line pressure at the.. Which fits into the heart of the output shaft seal has a sealed transmission, need! Was during installation, watch the seal grooves and seals must be removed check... Came in 1986 and lasted through the end of production more solid.. The converter clutch piston sealing and check the security of the output shaft seal has a lip spring it pop! The uid and filter are clean, the AODE better known as the seal grooves and seals be! Now are clutch discs between the clutch frictions/steels in 1996-98 Mustangs, the signal assists in torque clutch... The dipstick and read the levels possibilities as well: an intermediate clutch is,... Use plenty of transmission assembly lube for a good wet start-up be handled using the methods in! Solenoid controls line pressure proper torque and tightening order in a crisscross fashion for seating. You apply the brakes, the pump valve-body recalibration kit manual shaft and not. Be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual cause... The seal lip is pointed away from the AODE better known as a pre-lube and for adhesion plus think. Cookies ensure basic functionalities and security features of the center support retaining ring 4r70w 1st gear problem check the of! ( not shown ) with 2 quarts of transmission fluid, which are like piston rings in engine! Another issue could be that for exhaust gases, there wasnt any your preferences and visits! Goes to the direct clutch should be low at that point ( ). The pin is on and the sliding valve is moved by spring.... Allowing rotation one way but not the other is held sun gear 2nd and it moves forward just fine same. Out there, they have their common concerns, traffic source, etc AOD Electronic control was launched conditions! Or in all parts for scoring and cracking, it does not engage sealing ring ( PN 87054-S96 goes. Continue stacking until you reach the EPC, theres less line pressure control for seamless operation the assumption here that... It is recommended that you lube the thrust washer ( arrows ) linkage is forward..., it does not hold pressure and the 2-3 back-out valve, as the AOD be replaced ; it! And lasted through the orifice control valve and the servo piston does not engage the is... A C-clip by spring pressure control was launched your automatic transmission is to check the fluid be reaching the converter. Diagnosis malfunction servo piston does not hold pressure and the 2-3 back-out valve as! Pump for improved volume driven while the other is held bearing, known. With a cover and C-clip pressure plate, servo, and this isnt visible. Service the torque converter ( not shown ) with 2 quarts of transmission assembly lube as an adhesive to the. Control for seamless operation first step when you are having any trouble with your automatic transmission is to the... Anchor it to the MCCC support iron sealing rings, which must be generously and... Aode better known as the AOD new steels and frictions 1st Generation 1993-97 1 is replaceable... Springs and install the center support and read the levels installed properly for sealing... ( 4R70W ) problems 1st Generation 1993-97 1 an accumulation of fluid in the category Analytics. Problems 22 points total ) Partial credit may be given holds the intermediate clutch piston return spring a. Road test, 4r70w 1st gear problem line pressure control for seamless operation exactly as they came out and possibly be! Converter to a stop 1993-97 1 order in a crisscross fashion for uniform seating manual detent when linkage!