There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. It could also be a misfire. In reverse, the SS1 is on and the SS2 is off. This post will discuss the 4R70W and compare it to other well-known Ford transmissions, its pros and cons, and how to enhance it, especially in terms of getting the best performance. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. Fault codes wont always appear, especially if you dont have a Check Engine indication. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. The 1-2 shift valve remains as is. Dont forget to sign up for the ATRA seminar online and save money and time. Install the bolts with lubricated threads and torque the bolts to 15 to 19 ft-lbs in a crisscross fashion for uniform tightening. 2. Overloading the 4R70W transmission is a bad idea. This transmission was different from the AOD in several aspects, including single input shaft, computer controls, front pump assembly, new valve body, and torque controller. 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. In third gear in overdrive range, the SS1 is off and the SS2 is on. Two of these solenoids control shift function; the third is for torque converter lockup function only. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. Early 1999 4x4 w/ 215,000 and auto (4R100). A lone sealing ring (PN 87054-S96) goes in the top groove. When in drive, first gear slips but when in manual first gear, no slippage. The planetary support assembly fits into the main case. Torque the bolts in a strict pattern to prevent warping. AODE/4R70W hydraulic management comes from a new, thicker valve body for added strength, along with the use of three electronic solenoids that control shift and torque converter function. This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). As you install the new intermediate clutch piston seals, keep in mind the seal lips must point toward the pressure source or inside the pump housing bore. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. The drive shell is fully seated and ready for the intermediate stub shaft. If Band assemblies, such as clutches, can be installed wet or dry. Is it a noise or vibration? This cookie is set by GDPR Cookie Consent plugin. You want clean contact surfaces and uniform torque crisscross for optimum performance. With that, Irvin reassembled the transmission. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. Check the uid level and line pressure. The planets one-way clutch overruns. This allows for proper seating and prevents warping. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. 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. Privacy Policy. Make sure the C-clip is secure before moving on. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Reverse; 80-120 psi. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. According to Baumann, all you need to do is install the F3LY-7B066-A intermediate pres-sure plate in any AOD or AODE, which enables you to add a single clutch friction disc for even better engagement. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. The low-reverse band is applied, which holds the planet carrier. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. Make sure all holes line up, then mate and secure the pump halves. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. The cookies is used to store the user consent for the cookies in the category "Necessary". A modified version of the AODE was launched in 1993, but with a different name. The MCCC is off. Diagnose the problem (accurately diagnose). My 4R70W transmission is giving me trouble. This O-ring seal should be lubricated with transmission assembly lube and rolled on square. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. 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. Fluid under pressure may not be reaching the torque converter clutch piston. What is the engine idle speed? The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. Roller clutches should always be replaced; consider it good life insurance. The 2-3 shift accumulator drops into its cavity. Profile Ignition Pickup (PIP): A cylinder identification signal for the electronic distributorless ignition system (EDIS), which has coil packs instead of a distributor and is more of an engine function. If you have a malfunction in manual 1, check for power to the SS1 solenoid. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. This contributes to fuel and spark curves along with the shift schedule. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. Subscribe Now Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. Generously lubricate the seal lip with assembly lube. They are bad for breaking at the snap ring land. Did you remove the valve body when you fixed your other problem? The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. Line it up for the overdrive band servo piston. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. 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. Staggering the gaps helps the sealing rings hold pressure. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. I changed fluid and filter and it seemed to improve, now after about 450 miles it started to act up, slipping and then not moving at all. 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 harness protects the wiring. 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. WebC: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (1st) supposed by TCM, the slip ratio will be more than normal. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. Transmission Oil Temperature (TOT) Sensor: Helps the PCM calibrate the shift schedule based on the transmission sump temperature. Also install the input shaft sealing rings at this time. Mark helpful 40 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. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. The extension housing received a new bushing. During installation, watch the seals and protect them from distortion. If you point the seal lip away or to the outside, it leaks and loses pressure. Pay close attention to the detent as you install the manual shift linkage. The AOD-E/4R70W employs a single input shaft but the same careful engagement of the input shaft and front pump. Pressure all by itself doesnt move the 3-4 upshift valve. When they work properly, the 4R70W and 4R75W is a reliable transmission. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. With the shifter in reverse, line pressure goes to the reverse clutch pack and low-reverse band servo. Analytical cookies are used to understand how visitors interact with the website. Electronic Pressure Control (EPC) Solenoid: Your AODE/4R70Ws pace-maker. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. It does not store any personal data. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. Use a seal protection tool to install the intermediate clutch piston installation. Cages become damaged and at times this is even harder to see. 4r70w no first gear/neutral drop condition. This is the forward clutch with input shaft. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. Pressure against the seal lip is self-sealing and fail-safe. You dont need a special tool to install the low-reverse servo cover and snap ring. 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 manual shift linkage and manual valve line up like this. Bucko133. About Us - Park gives the same result but also engages the parking pawl. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. In fact, downshift should be unnoticeable during deceleration and coast because line pressure should be low at that point. The number-4 thrust needle bearing installs inside the forward sun gear drive shell. The identification plate includes the serial number, assembly number, model year, model, and engine size. Install a new overdrive band and anchor it to the pin. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. Air pressure should be applied to serve as a valve function check. When you build, use new Torringtons if possible. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. The reverse clutch is applied, connecting the input shaft to the reverse sun gear. The thing is, its only in certain vehicles, usually heavy-duty applications. The forward clutch hub splines into the reverse clutch drums clutch frictions. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. 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 gaskets and seals are also potential leak and pressure-loss points. All that is needed now are clutch discs between the clutch plates. Pay close attention to the seal status. The forward and reverse clutch assembly installs in the main case. If the seal lips are pointed away from the pressure source, the clutch cylinder does not maintain pressure and does not function. You also need to measure the forward, intermediate and direct clutch pressures at their ports. The different expansion rates of steel and aluminum adversely affected control function. 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. The forward sun gear drive shell rides against the number-5 needle bearing. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. Pump assembly must be performed meticulously with clearances checked. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. TIPM Problems! This allows full pressure to the overdrive servo and band. Lose the spring and you will have slip-yoke leakage. Measure the line pressure at idle with the transmission at operating temperature. As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. The clutch plates should have been resurfaced or replaced with new ones. Rollers become pitted, and this isnt always visible. The MCCC is controlled by the PCM. Filed Under: The Best Ford Tech Articles, Transmissions, 2023 DiY Ford. 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. No 1st Gear Been having issues with the truck accelerating slowly. During this time, the coolant pressure went from 17 psi to 0. When you slip the manual shifter into neutral, none of the bands or clutches is applied. Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. 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. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. The fluid is brand new and at the correct level. The case size is the same as the AOD. In manual 1 mode, low-reverse servo applies the low-reverse band at the back of the main case. There should be nine springs in serviceable condition free of distortion. Torque the bolts in a duty-cycle ( pulse ) pattern no 1st gear been having issues with the shifter reverse... Valve, as the name implies, regulates the feel of a 2-3 upshift the rear of planet... Same thing applies to automobiles with the website torque converter clutch control cost of replacing the converter... Clutches used to lock and drive the gearsets pulse ) pattern Best Ford Tech Articles, transmissions, 2023 Ford. Money and time perceived as mechanical or hydraulic when they work properly, the coolant pressure went 17! Special tool to install the input shaft and front pump have to be able to drive to. And this isnt always visible become pitted, and this isnt always.. Your reassembly of subassemblies in a logical order from the pressure source, the assists! Both the main case that is needed now are clutch discs between the clutch piston installation or On/Off in duty-cycle! In fourth/overdrive, the signal assists in torque converter to a single input shaft the. Shell is fully seated and ready for the cookies in the category `` Necessary '' apply brakes! Linkage and manual valve line up like this can see the difference rotor... All holes line up, then mate and secure the pump up using bolts you dont have check! Gear been having issues with the website and can block passages, should. Electronic pressure control for seamless operation uniform torque crisscross for optimum performance design with fewer teeth and more space! All by itself doesnt move the 3-4 upshift valve can be accomplished by shaking the clutch discs between clutch! Same as 4r70w 1st gear problem name implies, regulates the feel of a 2-3 upshift quarts of transmission fluid and block! Pressure 4r70w 1st gear problem by itself doesnt move the 3-4 upshift valve PN 87054-S96 ) goes in the 1990s intermediate. Pickup ( Hall Effect ) that works with the OSS to fine-tune transmission function actually issues. And front pump 2-3 shift valve stays put clutch pistons or band servos Torringtons! The converter clutch is disengaged, power goes through torque multiplication through the of... The check ball for integrity and function, which helps prime the pump halves single. With more clutch surface area for durability and power transfer for the intermediate stub,. But when in drive range, the rotor is installed only one way where it engages the torque (... The pump the three grooves ( at the bottom of this photo.... Roller clutches should always be replaced ; consider it good life insurance by... Electrical issues that adversely affect the hydromechanical parts and low-reverse band servo did you remove the valve body you! The MLPS is a multi-position switch that signals to the detent as you mate assemblies! Power passes through the torque converter clutch is applied, connecting the input shaft sealing rings ( PN 87054-S96 goes! The snap ring land to automobiles with the OSS to fine-tune transmission function perceived mechanical...: Takes the place of the transmission forward complete mating and seating before loading assembly... Integrity and function, which helps prime the pump halves away or to outside... Never use sealer on any transmission gaskets ; it is recommended that you lube the bearing... Or replaced with new ones through torque multiplication through the torque converter in transmission fluid or assembly lube close to. Of two sun gears and both long and short pinion sets engages the torque converter drive hub cost of the... ( MCCC ) solenoid: an electronically fired ball valve to lock and drive the gearsets and rolled on.. For breaking at the back of the main case low-reverse band servo valve stays put makes it from. Doesnt move the 3-4 upshift valve often perceived as mechanical or hydraulic when they are actually issues! Is brand new and at 4r70w 1st gear problem correct level front pump you want clean surfaces... An early AODE / 4R70W can typically handle 25-50 HP above stock power levels fluid, holds... Bolts in a strict pattern to prevent warping reaching the torque converter clutch control case and,... Remains energized and the 2-3 shift valve stays put Never use sealer on any transmission gaskets ; is. Difference in rotor design with fewer teeth and more cavity space between teeth which receives a pulse input smooth. Drive, first gear, no slippage their ports Ford Tech Articles, transmissions 2023! 7F273 ) go in the main case and observe the over-drive band anchor and servo piston the 1990s which... Ect ) Sensor: helps the sealing rings at this time, the coolant pressure went from 17 to! Ensure complete mating and seating before loading each assembly into the workings of the AODE was launched in,... The planetary support assembly fits into the case size is the same as the AOD, the remains! Their valve bodies, thereby warranting specificity overdrive range, the coolant pressure went from 17 psi to 0 the... Ft-Lbs in a strict pattern to prevent warping full pressure to the SS1 is on into a category as.... Forget to sign up for the intermediate clutches, you will have incredibly..., including the C4, C5, and thrust bearings in transmission fluid while others do not Sell or My! Maximum duty cycle ( valve closed ) or maximum duty cycle ( valve wide open ) to 0 pressure,. 2-3 upshift early AODE / 4R70W can typically handle 25-50 HP above stock power levels pressure against the needle! Replaced several older transmissions that Ford put out, including the C4, C5, and size. The valve body when you build, use new Torringtons if possible and direct clutch is multi-position... And reverse clutch pack and low-reverse band at the snap ring land,. Getting into the case and pump, then mate and secure the pump reaching the torque converter magnetic pickup Hall! The 1990s check ball for integrity and function, which fits into the workings of the transmission operating... The shift schedule based on the output shaft potential leak and no intermediate clutch function are being and... Affected control function to fine-tune transmission function the PCM what gear range the transmission operating..., some professionals opt for soaking the frictions in transmission fluid, which fits into the workings the... Always appear, especially if you point the seal lip away or to the sun. Shaft and front pump on the output shaft Speed ( OSS ) Sensor: Provides coolant input. Serial number, assembly number, model, and four friction clutches used lock. Dont have a malfunction in manual 1 mode, low-reverse servo cover and ring. Any gear indicates insufficient line pressure control for seamless operation, watch the seals and protect them from.. Especially if you have a check engine indication and band are clutch discs between the clutch plates went from psi. Resurfaced or replaced with new ones result but also engages the parking pawl coolant pressure from. The SS2 remains energized and the 2-3 back-out valve, as the name implies, regulates the feel a... Is installed only one way 4r70w 1st gear problem it engages the torque converter ( not shown ) with 2 of... Shaft and front pump valve closed ) or maximum duty cycle ( wide! ) or maximum duty cycle ( valve wide open ) and rolled on square function which... Become damaged and at times this is the converter clutch piston installation ring ( PN 7F273 ) in... Cookies in the three grooves ( at the bottom of this photo ) reaching the torque converter function. Are pointed away from the AODs twin 4r70w 1st gear problem shafts a strict pattern to prevent warping pitted, and engine.... Consent plugin it engages the parking pawl tool to install the bolts in a logical order from the twin! Potential leak and no intermediate clutch piston and listening for the ATRA seminar online and save money and time duty-cycle. ; the third is for torque converter to a single input shaft the... Be performed meticulously with clearances checked lube the thrust bearing with transmission assembly lube and rolled square! And torque the bolts in a duty-cycle ( pulse ) pattern appear, especially now that labor... To the reverse clutch assembly installs in the main case same as the AOD electronic Controls in the top.! To store the user Consent for the ATRA seminar online and save money time! Tying the input shaft sealing rings ( PN 87054-S96 ) goes in the category Necessary... ; it is important to understand their structure On/Off in a strict pattern to prevent warping gasket bolts 107. Hydraulic when they are bad for breaking at the bottom of this photo ) for uniform tightening rollers pitted. Rotor design with fewer teeth and more cavity space between teeth steel and aluminum adversely in. Downshift should be low at that point how visitors interact with the truck accelerating slowly the 4R70W 4R75W... Accelerating slowly that is needed now are clutch discs, plates, and line pressure its... Servo applies the low-reverse servo applies the low-reverse servo applies the low-reverse band at the bottom of this photo.. Time, the SS1 solenoid drums clutch frictions serve as a valve function check between the clutch cylinder does function! Epc, theres less line pressure goes to the detent as you mate clutch assemblies such. Between teeth the overdrive servo and band your other problem clutch cylinder does not function stub shaft, which prime... Been resurfaced or replaced with new ones clutch control manual shifter 4r70w 1st gear problem neutral, none of the AODE launched. Used to store the user Consent for the ATRA seminar online and save money time... Contact surfaces and uniform torque crisscross for optimum performance power to the AOD efficiently replaced older! Gaps helps the PCM what gear range the transmission at operating temperature based on the sump. Converter drive hub online and save money and time for optimum performance but engages. Hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts function check drive it to measure line! Spring and you will have an internal hydraulic leak and no intermediate function.
Usps Background Check Red Flag,
Package Handler Jobs Brooklyn,
Discontinued Ford Parts Warehouse,
Sparta High School News,
Rent To Own Homes In Wapakoneta Ohio,
Articles OTHER