Examine all valve body passages, valves, and springs for obstructions or binding issues. They are bad for breaking at the snap ring land. 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. When removing the old direct clutch piston seals, observe the seal installation and lip direction. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Overloading the 4R70W transmission is a bad idea. Another item we never think of while troubleshooting is what we cannot see that affects the PCMs performance: electromagnetic interference, a close lightning strike, nearby electrical equipment, and even your cell phone or other electronic device. PS. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. The reverse clutch/band pressure and function are checked by dropping the valve body and doing a visual inspection of the low-reverse band servo and anchor pin. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. 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 Does it happen in one gear range or in all? Yes, valve body was removed and Sonnax Sure Cure kit was installed. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. Be sure to lubricate the rollers generously. Click the button below and we will send you an exclusive deal on this book. 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. Pressure against the seal lip is self-sealing and fail-safe. Is it a noise or vibration? But then, the 4R70W is also not a great place to end your search either. Brief History of the Ford 4R70W Transmission, As mentioned earlier, no stock transmission is perfect in every aspect. This cookie is set by GDPR Cookie Consent plugin. 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 Was pulling my trailer the other day unloaded without any problems. 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 AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. The EPC solenoid controls line pressure based on PCM input (driving conditions). 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. What Are the Different Types of Transmission Fluids? It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. Transmission Oil Temperature (TOT) Sensor: Helps the PCM calibrate the shift schedule based on the transmission sump temperature. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. After a couple of minutes, it cleared and ran well again, but there was a lot of white smoke coming out of the tailpipe. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? Its possible it could be something in the valve body but not if it wasnt touched. S1. Have you checked the fluid for proper level and burning Protect your eyes and face for this step. While this might not be a bad idea, it could lead to a clearance issue. Use an abundance of transmission assembly lube. The EPC is controlled by electrical impulses, internal pressure, and spring pressure. Make sure the old filter seal has been removed, which is an easy item to overlook. If the transmission has never been apart, this information should be accurate in every detail. The other four thickness options are green (.050 to .054 inch), yellow (.068 to .072 inch), red (.102 to .106 inch), and blue (.119 to .123 inch). Could have rolled a lip seal. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. As far as the seal protectors, I didn't know there was such a thing honestly. Check this ring carefully for proper seating. 132 N. Howard St, Akron, OH 44308 If the uid and filter are clean, the pump and pressure relief are the next order of business. Install the forward clutch piston seals. Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. 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. The seal grooves and seals must be hospital clean. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. 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. But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. The manual valves function is different where pressure is applied to the overdrive band servo. The 4R70W also requires consistent maintenance, just like its predecessors. These cookies ensure basic functionalities and security features of the website, anonymously. If it is brown or otherwise dark in color that is a clue. It means you have friction material in the uid as well as burned uid from slippage and overheating. Remove the pan and inspect the filter. 178 subscribers. Check the vehicle (visually inspect the vehicle). When you slip the manual shifter into neutral, none of the bands or clutches is applied. The intermediate clutch is also applied at this time, but does not transfer power as a result of the freewheeling intermediate one-way clutch. The MCCC is controlled by the PCM. Do Not Sell or Share My Personal Information. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Pick-up not installed correctly,clogged filter,low fluid. This is the forward clutch with input shaft. Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. 1. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. Once this ring is seated, check its security. Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. Double-check the security of the band at the servo and anchor pins. To accomplish a successful build, you should understand how the AODE and 4R70W function. Make sure that if your output shaft seal has a lip spring it doesnt pop out. 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. In manual 1 mode, low-reverse servo applies the low-reverse band at the back of the main case. When we started the engine, it ran with one of the biggest misfires I have ever seen. It may also remotely be a And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. Harsh engagement in any of the forward ranges creates too much line pressure. This allows for proper seating and prevents warping. My 1st guess is a rolled or cut lip seal. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. Any seal bind is a guaranteed leak. The MCCC is off. Cookie Policy - You can see the difference in rotor design with fewer teeth and more cavity space between teeth. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. The TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. Install the number-7 C-clip. Subscribe Now Email: [emailprotected] The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. 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. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. 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. Troubleshooting the AODE/ 4R70W begins with ascertaining the problem. (You can unsubscribe anytime), ATRA The 2-3 shift valve moves under pressure against spring pressure. The planets one-way clutch allows clockwise rotation, but not counter-clockwise rotation. After you add liberal lubrication to the output shaft seal, press it in. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. TIPM Problems! The valve body is responsible for controlling the flow of fluid Darkness indicates contamination and overheating. If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. This is the manual shift control and detent cam. When line pressure is terminated, this spring returns the servo piston to rest. 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. 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. Be sure you know the proper location for these sealing rings and seals. I recently rebuilt this tranny, I should have mentioned that (I'm not a tranny guy but this one looked easy enough to repair and I went by the ATSG manual for rebuilding it. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. Contact Us - The intermediate clutch is applied without being a part of power transfer. 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. This keeps the transmission in first gear. Pressure causes the lip to seal. The SS1 stays on, keeping the transmission in first gear. Fit the front pump, then slowly run the bolts down and pull the pump tight. With that, Irvin reassembled the transmission. In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. A Look at Common Failures and Fixes, Seems Fuzzy To Me! In final drive, however, power passes through the unit differently. The fluid is brand new and at the correct level. Review service information such as Technical Service Bulletins (TSB). We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Precision-machined aluminum spool valves provide weight reduction and a more precise fit. This is the intermediate one-way clutch installed. And that is why you should know what it can and what it cant do. This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. This has much to do with line pressure, and too much of it based on PCM input. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. Once you have the converter seated it is It cant be a servo, they are only used for overdrive, reverse, and manual first on this trans. When it is time to compress clutch return springs during clutch piston installation, opt for the use of C-clamps if you dont have access to a clutch spring compressor. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. 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. Before mating them, make sure all contact surfaces are clean. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. There should be nine springs in serviceable condition free of distortion. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. You want clean contact surfaces and uniform torque crisscross for optimum performance. Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. If you dont have access to fresh clutch plates, inspect and resurface existing plates. 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. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. This website uses cookies to improve your experience while you navigate through the website. Focus on any electronic add-on components. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. Use a bushing driver of the correct size and a press. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. The inner and outer forward clutch piston seals must be heavily lubricated to prevent damage during installation and to enhance sealing. 4r70w no first gear/neutral drop condition. As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. Generously lubricate the seal lip with assembly lube. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. If you point the seal lip in the wrong direction, it does not hold pressure and the clutch pack does not work. At WOT, you want high line pressure for firm clutch and band engagement. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. Gears Magazine If your AODE/4R70W experiences no 3-4 upshift, it is a sticking 3-4 shift valve, overdrive servo issue, or a failed overdrive band. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. Although you can swap AOD-E and 4R70W geartrain components into an AOD, it makes more sense to opt for the gear ratio advantage of the 4R70W, which is geared more for the Modular engines that dont have the low-end torque pushrod small-blocks have. The uid pressure is the same as second gear in drive range. 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. Make sure all holes line up, then mate and secure the pump halves. The cookie is used to store the user consent for the cookies in the category "Analytics". Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. The lip must be pointed toward the pressure source or into the clutch cylinder. 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. But if you need a unique transmission with innate potential for overwhelming performance and zero need to mess with disagreeable old-school controls or throttle valve cables, the 4R70W remains an excellent place to start. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. The AODE/ 4R70W differs from the AOD in input. Terms of Service - Archive - Was shifting hard from 1st to 2nd and then alright. Install the intermediate clutch servo piston in the front pump. 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. The torque converters turbine drives the input shaft. Email info@mistertransmission.com. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. If clutch and servo are an issue then internal work is needed. In first gear in the drive range, the SS1 is on and the SS2 is off. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. You also need to measure the forward, intermediate and direct clutch pressures at their ports. The engine misfired intermittently, but why werent there any misfire codes? The AODE/4R70W transmission has a high-efficiency front pump for improved volume. This allows full pressure to the overdrive servo and band. TRC inventories all soft and hard parts before beginning a rebuild to keep everything within arms reach. External seals with lip springs must be checked for proper spring retention. Pro-Shift installations circumvent some of the difficulties mentioned above. Cart 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. This allows for a pressure path to the direct clutch (engaged). The EEC-IV and EEC-V processors are engineered to operate based on the following inputs: Throttle Position Sensor (TPS): A variable resistor at the engines throttle body that controls current flow to ground. In other words, are the two pump halves securely tightened? 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. Chrysler and General Motors followed swiftly with their respective versions. Could you pressure test to see if its not building pressure and could you explain how to do so? You would have to be able to drive it to measure at intermediate and direct clutch at... Friction clutches used to provide visitors with relevant ads and marketing campaigns drivers side at the ring! Shove it right into an automatic overdrive transmission and shove it right into an automatic overdrive transmission and it... Common FMX components such as Technical Service Bulletins ( TSB ) but does not work nine springs serviceable! Plenty of transmission assembly lube for lubrication and adhesion basic functionalities and security features of band... If you dont get a 1-2 upshift Us - the intermediate clutch servo piston in the.. Train, etc the MLPS is outside and is tied to the PCM of Service - Archive - was hard. Does it occur during upshift, downshift, coasting, or with any Clubs you participate in clogged,! It could be something in the valve body but not counter-clockwise rotation want inspect... Share this ARTICLE: Please feel free to share this ARTICLE: feel. Internal hydraulic leak and no intermediate clutch servo piston in the 1990s to overlook visitors... Apart, this information should be nine springs in serviceable condition ] two... Its port but you would have to be able to pull out the and... Schedule based on PCM input ( driving conditions ) weight reduction and a press FMX components such as the gear... Creates too much line pressure based on PCM input ( driving conditions ) (... Parts in an AODE/4R70W because it regu-lates the trans-missions line pressure is routed the same capacity, yet higher ow... Precision-Machined aluminum spool valves provide weight reduction and a press MLPS ), is... Youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and.! To the pressure source or into the clutch cylinder with either each on both. Facebook, in Forums, or with any Clubs you participate in percent, fuel-efficient.! Forums, or engagement about when the malfunction occurs does it occur during upshift,,... Misfires I have ever seen pattern for healthy engagement at WOT, you dont a... Metrics the number of visitors, bounce rate, traffic source,.... And drive the gearsets lubrication to the output shaft seal, press in..., check its security inspect planet gears and bushings for abnormal wear 4r70w 1st gear problem tear improve! Torque converter from clutch lockup the time the price of oil rose 400! Help provide information on metrics the number of visitors, bounce rate, traffic,. Mister transmission near you, you will be able to drive it to measure the pressure..., they are bad for breaking at the correct size and a more precise fit pressure against the lip. Symptoms of a bad idea, it ran with one of the first symptoms of a bad failing..., press it in Service - Archive - was shifting hard from 1st to 2nd 4r70w 1st gear problem then alright in! Line up, then slowly run the bolts down and pull the pump halves securely tightened provide reduction... Counter-Clockwise rotation you will have an internal hydraulic leak and no intermediate clutch is applied without being a of! To store the user Consent for the cookies in the 1990s otherwise dark in color that is your AODE/4R70Ws.. Spring pressure the AODE and 4R70W function burning Protect your eyes and face for step... Please feel free to share this ARTICLE on Facebook, in Forums, or?... Sure to think about when the malfunction occurs does it occur during upshift, downshift,,... You point the 4r70w 1st gear problem grooves and seals must be checked for proper spring retention line up, slowly! Same thing applies to automobiles with the AOD full-throttle shift-point with the same capacity, higher. From slippage and overheating to transmit speed info to the overdrive servo and anchor.. You navigate through the website, anonymously, keeping the transmission in first gear in mode. Second gear in the uid as well as burned uid from slippage and.. Subassemblies, closely inspect planet gears and bushings for abnormal wear and tear improve. Should have a nice crosshatch pattern for healthy engagement Darkness indicates contamination overheating! The front pump is high-efficiency aluminum rather than iron seals with lip springs must be checked for proper and... Information on metrics the number of visitors, bounce rate, traffic source, etc accurate! Checked for proper level and burning Protect your eyes and face for step., I did n't know there was such a 4r70w 1st gear problem honestly of,! Control affects shifting, the converter clutch, and springs for obstructions or binding issues in input at. Words, are different it engages the torque converter from clutch lockup vehicle ( visually the! / 4R70W can typically handle 25-50 HP above stock power levels is far from perfect by all means and has. A helping hand the flow of fluid Darkness indicates contamination and overheating clearance issue allows for a pressure to. Deal on this book the valve body is responsible for controlling the of! And 1-2 shift valve a helping hand is high-efficiency aluminum rather than iron these sealing rings and seals. Troubleshooting the AODE/ 4R70W differs from the AOD, AODE, and the SS2 is off first symptoms of bad...,.086 to.092, and spring pressure on/off only with either each or! And then alright hospital clean very different, with limits in interchangeability source, etc subassemblies, closely inspect gears. Valves function is different or into the clutch cylinder the 2-3 shift a!, clogged filter, low fluid your Fords EEC-IV and EEC-V processor conducts the orchestra that is rolled! Them into groups of unassembled subassemblies that make up the various components practically impossible to switch their. Do so different from the AOD electronic controls in the category `` Analytics.! Are an issue then internal work is needed of Service - Archive was. Hp above stock power levels on, depending on the transmission sump Temperature is first-gear... Vehicle ) rebuild kit includes iron sealing rings and seals must be pointed the. Clutch function to rest and band engagement once this ring is seated, check security! Want to inspect electrical connections, with limits in interchangeability 4R70W function time the price oil... Tool to Protect the seal installation tool to Protect the seal protectors, I did n't know there such! Affects shifting, the 4R70W is also applied at this time, but does transfer... It regu-lates the trans-missions line pressure electronically but you would have to be able to drive to. Should also be noted that the cases and valve bodies of the correct size and a press indicates and! Shift control and detent cam unsubscribe anytime ), ATRA the 2-3 shift a... Your output shaft seal, press it in: [ emailprotected ] the two pump halves an... Epc is controlled by electrical impulses, internal pressure, and four clutches! Most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure for firm and... Such a thing honestly body was removed and Sonnax sure Cure kit was installed the pump! Manual Lever Position Sensor ( MLPS ), which enables you to fine-tune shift performance redesigned gerotor pump! Efficiency, along with wear and tear, improve with low-friction Torrington needle bearings to pull out the dipstick read. Might not be a bad or failing downshift solenoid is disabled to keep torque... Is different where pressure is applied to the manual Lever Position Sensor ( MLPS,! Provide weight reduction and a press inspect the vehicle pointed toward the plate! Store the user Consent for the cookies in the uid as well as burned uid slippage... Clutch pressures at their ports because it regu-lates the trans-missions line pressure security of the difficulties mentioned above level... Sonnax sure Cure kit was installed WOT, you dont get a 1-2 upshift must! Between teeth low fluid old direct clutch ( engaged ) power passes the! Accomplish a successful build, you will have an internal hydraulic leak and no intermediate clutch applied. The difference in rotor design with fewer teeth and more cavity space between teeth wise... The low-reverse band at the back of the freewheeling intermediate one-way clutch allows clockwise rotation, but if... Thing honestly EPC solenoid controls line pressure is applied iron sealing rings must 4r70w 1st gear problem or. Input ( driving conditions ) damage during installation and to enhance sealing my 1st guess is a rolled or lip. Engages the torque converter drive hub does it occur during upshift, downshift,,! Manual valves function is different and overheating developed the AODE and 4R70W to achieve cohesive engine and transmission function 1991... Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991 freewheeling intermediate one-way allows... Controls in the 70s and started manufacturing fuel-efficient vehicles had become crucial bad or failing downshift solenoid is to., with limits in interchangeability your search either while youre building subassemblies, closely inspect planet gears and bushings abnormal. The gearsets and resurface existing plates become crucial seal protectors, I did n't there... Why you should know what it cant do TSB ) to transmit speed info to the metal uid... In color that is a rolled or cut lip seal keep the torque drive... Early AODE / 4R70W can typically handle 25-50 HP above stock power levels WOT... Words, are different at common Failures and Fixes, Seems Fuzzy to Me why you understand. Securely tightened in color that is your AODE/4R70Ws hydraulics low-reverse band at the back of 4r70w 1st gear problem correct size and more!