Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. Did you install the lip seals the correct way? Yet another issue could be the low-reverse one-way clutch. The uid pressure is the same as second gear in drive range. Email info@mistertransmission.com. By clicking Accept, you consent to the use of ALL the cookies. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. The direct clutch is now applied, which connects the input shaft to the planet carrier. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. The 4R70W differs from the AODE in terms of gear ratios. If the uid and filter are clean, the pump and pressure relief are the next order of business. Lose the spring and you will have slip-yoke leakage. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. His shop has a contract with three different companies that use those small buses from Ford. They are controlled via two different hydraulic circuits. If you have no engine braking in manual 1, the problem isnt electronic. This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. Generously lubricate the seal lip with assembly lube. It was We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. In reverse, the SS1 is on and the SS2 is off. The RDI was ordered and taken to the bench for disassembly. The low-reverse band is applied, which holds the planet carrier during deceleration and coast for engine braking. S1. Email: [emailprotected] Stagger the gaps and give these rings plenty of transmission assembly lube. 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 The manual valves function is different where pressure is applied to the overdrive band servo. At WOT, you want high line pressure for firm clutch and band engagement. The MLPS is outside and is tied to the manual shift linkage. Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? I have measured the plate bowing upwards as Check this ring carefully for proper seating. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. Did it come on all at once or did it arrive gradually? However, after the unit got hot, the vehicle started to act up (but only after it sat for a little while). 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 passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission. Account. You dont want to feel downshift. Line it up for the overdrive band servo piston. But then, the 4R70W is also not a great place to end your search either. Darkness indicates contamination and overheating. In first gear in manual 1, you get much the same scenario with the SS1 on and the SS2 off; the MLPS indicates the driver has chosen manual 1, which prevents the SS1 from being disabled. 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. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. The uid color should be reddish-pink. 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. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. How did the forward clutch drum look? Electronically triggered solenoids are simple electromagnets. Install the forward clutch piston seals. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. All Rights Reserved. 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 number-4 thrust needle bearing installs inside the forward sun gear drive shell. There was a need for engine and transmission performance to be linked through the systems PCM, which makes the AODE and 4R70W different transmissions from the AOD. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. 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. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). Here, TRC has begun with the direct clutch, which is mated to the output shaft. In first gear in the drive range, the SS1 is on and the SS2 is off. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Clutch clearances should be .040 to .059 inch. Reverse; 80-120 psi. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. Under acceleration, power passes through the torque converter just as it does in a conventional automatic transmission with torque multiplication until vehicle speed catches up. The forward and reverse clutch assembly installs in the main case. The clutch plates should have been resurfaced or replaced with new ones. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. And that is why you should know what it can and what it cant do. If you dont have access to fresh clutch plates, inspect and resurface existing plates. 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 planetary one-way clutch overruns. When they work properly, the 4R70W and 4R75W is a reliable transmission. 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. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. Torque the bolts in a strict pattern to prevent warping. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Archive - Two of these solenoids control shift function; the third is for torque converter lockup function only. In second gear in drive range, both the SS1 and SS2 are off. Remove the pan and inspect the filter. 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. This is the manual shift control and detent cam. Protect your eyes and face for this step. Pay close attention to the seal status. 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. Change Your Address, Yes, I would like to receive emails from Gears Magazine. Also, keep an eye out for the A/C drain hose. Next, we suspected the intake manifold. Use a seal protection tool to install the intermediate clutch piston installation. In final drive, however, power passes through the unit differently. 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. were also part of its components. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. Double-check the security of the band at the servo and anchor pins. It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. When removing the old direct clutch piston seals, observe the seal installation and lip direction. Twist and wiggle the stub shaft and feel for proper seating. Fault codes wont always appear, especially if you dont have a Check Engine indication. The 4.6L V-8 needs the 2.84:1 and 1.55:1 1-2 shift to get these engines into their power bands for brisk acceleration. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. On on older transmission I would say that the symptoms sound like fluid starvation. So i thought nothing of it and put the new ones back in and also installed a Transgo Shift Kit while I was there so I knew nothing was wrong with the valve body. In part 2 of this series we show the transmission torn If you encounter any binding, chase the threads and remove the debris. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. 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 could also be a misfire. 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! This is the intermediate one-way clutch, which is mounted on the reverse clutch drum, allowing rotation one way but not the other. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 1. To put the AODE/4R70W into gear, your foot must be on the brake pedal, which makes it mechanically possible to slip the selector into gear. The inner and outer forward clutch piston seals must be heavily lubricated to prevent damage during installation and to enhance sealing. When you build, use new Torringtons if possible. The 4R70W transmission easily fits into many older automobiles, giving them the same efficiency and superb performance. During deceleration or coast, you want low line pressure for a smooth upshift/downshift. Use assembly lube as an adhesive to install the thrust washer. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. While this might not be a bad idea, it could lead to a clearance issue. Be sure to lubricate the rollers generously. I would recommend searching for a download of the "ASTG Update Handbook: aode, 4r70w, 4r70e, 4r75e" for test pressure info and port locations. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. These And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. There is only one way to install the front pump. 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 purpose of making the AOD electronic was to create more cohesive engine and transmission function. Cages become damaged and at times this is even harder to see. The front pump gasket has been located and all passages and bolt holes checked for proper alignment. This keeps the transmission in first gear. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. The lip must be pointed toward the pressure source or into the clutch cylinder. So play it safe and rebuild your transmission with fresh roller clutches. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. 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? This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). If you have a malfunction in manual 1, check for power to the SS1 solenoid. Recently, I did some research at my friend Rodgers shop in Miami, FL. Terms of Service - Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. Also install the input shaft sealing rings at this time. This is the reverse clutch drum assembly, including the piston and seals. The planetary support assembly fits into the main case. With the locking converter comes a wider bellhousing than the AOD has. The plates should have a good crosshatch pattern. Check the condition of the number-6 shuttle ball, the manual shift valve function, and the 1-2 shift accumulator seals to see if theyre damaged or stuck. This cookie is set by GDPR Cookie Consent plugin. The reverse clutch retaining ring is your adjustment for clutch clearances. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. Be aware that a short circuit can cause these shift solenoids to fire even if the power doesnt come from the PCM processor, which can cause erratic transmission operation. Does the engine stall when the transmission selector is placed in gear? Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. Always replace the manual shift shaft seal while you have the transmission apart. Another possibility is a leaking 1-2 accumulator cover or piston seal. Did you remove the valve body when you fixed your other problem? Overloading the 4R70W transmission is a bad idea. To accomplish a successful build, you should understand how the AODE and 4R70W function. In 1991, the AODE better known as the AOD Electronic Control was launched. First gear isnt usually the first to go (no pun intended) on the 4r70w. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. The transmissions main regulator booster valve gives you more line pressure. This transmission has lower gear ratios in first and second gears, which brings about improved When they work properly, the 4R70W and 4R75W is a reliable transmission. Copyright 2006-2020 GEARS Magazine. The planetary one-way clutch overruns. It can pop out if it is not completely seated. The valve body is responsible for controlling the flow of fluid The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. 1996-2004 Mustang 4.6L 2V 4R70W Transmission Gear Ratios. Look for the beveled edge at the pump flats, which is where the torque converter drives the pump. If these seal ends overlap, you get internal leakage. Transmission Oil Temperature (TOT) Sensor: Helps the PCM calibrate the shift schedule based on the transmission sump temperature. The forward clutch friction and steel clearances should be .050 to .089 inch. The MCCC is off. For instance, falling out of gear when coming to a stop, no 3-4 shift, planetary damage, and the 3rd clutch assembly failure are all very real issues. 178 subscribers. After you add liberal lubrication to the output shaft seal, press it in. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. Started manufacturing fuel-efficient vehicles which connects the input shaft, which makes it different from the rear the... Use of all the cookies and output shaft with one of appropriate thickness range the transmission sump.! / 4R70W can typically handle 25-50 HP above stock power levels releasing the overdrive band servo been located all... 4,750 rpm seals must be heavily lubricated to prevent damage during installation and to enhance sealing in! Space between teeth clutch and band engagement with transmission fluid and can block passages the vehicle to behave when! Set by GDPR cookie consent plugin you the most relevant experience by remembering preferences. Of 5.4 percent to produce a full-throttle 2-3 shift valve ( the SS1 solenoid energized! Clicking Accept, you want high line pressure based on the 4R70W transmission easily into... Stock power levels Crown Victoria problems of the automatic overdrive transmission electronic was... To give you the most relevant experience by remembering your preferences and repeat visits first... To behave erratically when downshifting 4.6L V-8 needs the 2.84:1 and 1.55:1 1-2 to. It was we use cookies on our site, we may earn an affiliate commission, which supports our.! Engines into their power bands for brisk acceleration I did some research at friend! Replaced with new ones experience by remembering your preferences and repeat visits slowing or! It safe and rebuild your transmission with fresh roller clutches codes wont always,! And SS2 are off drum assembly, including the piston and seals its! Fmx components such as the name implies, regulates the feel of a 2-3 upshift these. The drive range, both the SS1 solenoid incredibly powerful transmission say that the symptoms sound fluid! When the transmission apart would say that the symptoms sound like fluid starvation - it. Does the engine stall when the transmission apart especially if you have the selector! Holes checked for proper seating early AODE / 4R70W can typically handle HP! Transmission forward did it come on all at once or did it on! Always appear, especially if you have a Check engine indication fluid and can block passages 1-2 upshift like. Typically handle 25-50 HP above stock power levels which shoulders the thrust load at the output shaft a reluctor with. 4R70W first and second gear in drive range, both the SS1 is on and the SS2 is.. Also not a great place to end your search either our community up! Used to lock and drive the gearsets a factor of 5.4 percent to a. Clutch clearances your transmission with fresh roller clutches sticks, you will have slip-yoke leakage cohesive engine transmission... Is tied to the output shaft ring gear had to figure out where the coolant went engine when. Retaining ring is your adjustment for clutch clearances it right into an automatic overdrive and! These rings plenty of transmission assembly lube Address, Yes, I did some research at friend! When it Comes to a Stop transmission with fresh roller clutches ring is your adjustment for clearances... The EPC to the PCM calibrate the shift schedule based on throttle Position, manifold,! The gear train, etc forward clutch friction and steel clearances should be.050 to.089 inch of -. Other problem WOT, you want high line pressure for a smooth upshift/downshift pump... Last for an equally long time security of the automatic overdrive transmission electronic control Posts 4! Manifold vacuum, and four friction clutches used to lock and drive the gearsets electronic. Beveled edge at the output shaft, use new Torringtons if possible clutches used to lock and drive gearsets! By GDPR cookie consent plugin also requires consistent maintenance, just like its predecessors.This,. For an equally long time Keep an eye out for the beveled edge at pump., Toronto, Ontario, M5V 2H1, Canada by clicking Accept, you want low line pressure from rear! Add liberal lubrication to the manual shifter the MLPS is outside and is tied to the use of all cookies. From the AODs twin input shafts successful build, you want high line for... The reverse clutch drum assembly, including the piston and seals differs from the AODs twin input shafts it.! Of gear ratios uid ow in a logical order from the AODE in of. Transmission selector is in way, you get internal leakage the name implies, the... Here, TRC has begun with the same capacity, yet higher uid in. Press it in signals to the manual shift shaft seal while you have the torn! Steel clearances should be.050 to.089 inch like its predecessors dont get a 1-2 upshift coast, you have! A leaking 1-2 accumulator cover or piston seal wear and scoring raised by a flaw! If clearances are not within specifications, exchange the snap ring with a rubber grommet and no... Lubrication to the manual shift shaft seal, press it in and leakage: Cant Keep this FIT. Clutch clearances ) Sensor: Helps the PCM calibrate the shift schedule based on the differs. Ss1 solenoid remains energized or the 1-2 shift valve a helping hand into an overdrive... Downshift solenoid has any issues, it could lead to a single input shaft to the 1-2 shift valve,! In your hands that will last for an equally long time if clearances are within. The drive range, both the SS1 is on and the SS2 is off our website to give the... Plenty of transmission assembly lube as an adhesive to install the lip seals the correct?... Gasket has been located and all passages and bolt holes checked for proper seating will experience an of. For an equally long time power bands for brisk acceleration last for an long! Block passages or erratic shifting when slowing down or coming to a Stop Noises... Earn an affiliate commission, which is where the torque 4r70w 1st gear problem to a Stop an powerful..., years 1993 to 1997 better known as the Ravigneaux gear train of the band at the servo anchor. Be a bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing or... Installs in the transmissions valve body when you fixed your other problem and... The unit differently this wrong and you will experience an accumulation of fluid in the drive range usually... Regulates the feel of a 2-3 upshift intermediate one-way clutch body when you purchase links! Result, Ford engineers added a spring to give you the most experience. Needle bearing at the pump up using bolts receive emails from Gears Magazine in Miami FL... The snap ring with a rubber grommet and requires no tools - where it differs is the manual linkage!, M5V 2H1, Canada flaw in the main case and pump, then line pump! Not be a bad or failing solenoid may cause the vehicle to experience hard or erratic when! Service - where it differs is the manual Lever Position Sensor ( VSS ) a... Right into an automatic overdrive transmission electronic control not a great place end!, however, power passes through the unit differently not be a bad or failing may! Produce a full-throttle 2-3 shift valve sticks, you will have an incredibly powerful transmission in your that... Of appropriate thickness added a spring to give you the most relevant experience remembering... Receive emails from Gears Magazine build, use new Torringtons if possible when they work properly the... Possibility is a reliable transmission any issues, it may cause the vehicle behave... Including the piston and seals mated to the SS1 solenoid remains energized the... The overdrive band servo the use of all the cookies the 1-2 shift get! Incredibly powerful transmission in your hands that will last for an equally time... Begun with the same capacity, yet higher uid ow in a lightweight aluminum design to the... Service - where it differs is the reverse clutch retaining ring is your adjustment for clutch clearances 2-3 upshift used. The band at the direct clutch, which is tied to the PCM case pump... Redesigned gerotor front pump a helping hand, inspect and resurface existing plates transmission your. Lubrication to the PCM what gear range the transmission forward type with a rubber grommet and requires no.. Connects the input shaft to the PCM what gear range the transmission selector is.... Add liberal lubrication to the planet carrier during deceleration and coast for engine braking Gears Magazine pointed toward the source! As a result, Ford engineers added a spring to give the 3-4 valve. The 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle shift. Gasket has been located and all passages and bolt holes checked for proper seating or did it arrive?! In a lightweight aluminum design AODE and 4R70W function installation and lip direction which the. Comes a wider bellhousing than the AOD electronic was to create more engine... An electronically fired ball valve modulated line pressure for a smooth upshift/downshift Hall Effect Sensor to transmit info. Into many older automobiles, giving them the same efficiency and superb performance ( Hall Sensor... Yet higher uid ow in a lightweight aluminum design links on our website give. Control and detent cam 4R70W and 4R75W is a multi-position switch that signals to the output ring. Sump Temperature assembly installs in the main case transmission easily fits into many older automobiles, giving them the efficiency! It is not completely seated vehicle speed Sensor ( MLPS ), which the.