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 reverse clutch piston snap ring pops into the clutch hub and retains the piston. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. The valve body is responsible for controlling the flow of fluid The lip must be pointed toward the pressure source or into the clutch cylinder. If the transmission has never been apart, this information should be accurate in every detail. In first gear in the drive range, the SS1 is on and the SS2 is off. Install the number-7 C-clip. As far as the seal protectors, I didn't know there was such a thing honestly. This is the forward clutch with input shaft. The direct clutch assembly was incinerated (we expected that). Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. Re: 4R70W tcc lock up in 1st gear. The EPC solenoid controls line pressure based on PCM input (driving conditions). When removing the old direct clutch piston seals, observe the seal installation and lip direction. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. The forward clutch piston installs using a Lip Wizard. Staggering the gaps helps the sealing rings hold pressure. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. 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. Filed Under: The Best Ford Tech Articles, Transmissions, 2023 DiY Ford. I would recommend searching for a download of the "ASTG Update Handbook: aode, 4r70w, 4r70e, 4r75e" for test pressure info and port locations. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. The pressure regulator valve bore in the valve body was worn out. The standalone solenoid is for torque converter lockup via solid input or pulsing (duty cycle). We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. 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. 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). 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. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. Always make sure the seal lips are pointed in the right direction, toward the pressure source (the bore), and that theyre not distorted. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. Renew Subscription There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. Even the smallest particle of dirt or dust can cause distortion and leakage. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. This requires careful twisting and turning until the clutches and hub fully mate. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. Begin with the simplest, most commonsense issues. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. 1. I'm having a problem with my transmission in my 2003 Ford F-150 4x4 (4R70W). There are four possible combinations of valve operation to obtain a given result. The bottom line is, its important to know how the system works. The manual shift linkage and manual valve line up like this. If you encounter any binding, chase the threads and remove the debris. 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. The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. The bolt torque is 62 to 88 in-lbs. Install the reverse clutch pressure plate against the Belleville spring. I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? Contact Us - Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. About Us - When we dropped the pan it was full of metal, as expected. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. 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. There should be nine springs in serviceable condition free of distortion. Another possibility is a leaking 1-2 accumulator cover or piston seal. It can pop out if it is not completely seated. Copyright 2006-2020 GEARS Magazine. The truth is there is no perfect stock transmission. The fluid is brand new and at the correct level. Not enough line pressure and you get slippage. What Are the Different Types of Transmission Fluids? As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. The forward clutch continues to be applied by pressure through the 3-4 shift valve. Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. 4r70w no first gear/neutral drop condition. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. Most automatic transmission shops have the equipment to check torque converter function. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. For a better experience, please enable JavaScript in your browser before proceeding. All bushings and thrust bearings should be replaced in the interest of durability. Use a seal protection tool to install the intermediate clutch piston installation. 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. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. The direct clutch hub goes up against the number-7 thrust bearing. If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. 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. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. In second gear in manual range, both the SS1 and SS2 are off. Top. The 4R70W transmission easily fits into many older automobiles, giving them the same efficiency and superb performance. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic The planetary one-way clutch overruns. FORD 4R70W TRANSMISSION SLOW GEAR SHIFT - 1-2 ACCUMULATOR KIT - YouTube My truck developed a slow and delayed shift from 1st to 2nd gear. Next, we suspected the intake manifold. JavaScript is disabled. Check this ring carefully for proper seating. While youre at it, check the manual shift linkage and manual shift valve. S1. Because the 3-4 shift valve has moved, there is no uid pressure to the forward clutch. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. It could also be a misfire. Air pressure should be applied to serve as a valve function check. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? The number-3 thrust needle bearing installs inside the forward clutch hub. 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The forward clutch friction and steel clearances should be .050 to .089 inch. Sales & Info: 330-434-5216 Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. If the uid level is normal and the uid color is good, the next item to check is the line pressure via the main pressure port. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. If you dont get converter clutch lockup, there may not be power to the MCCC. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. 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. 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 An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. The forward clutch hub splines onto the outer forward sun shell stub shaft. The planets one-way clutch overruns. This was a hydraulic transmission with throttle cable and governor.. 1993: (half year, Depending on month produced you could have hydraulic or computer controlled ford transmission) they Servo apply pressure is controlled by the low servo modulator valve. No 1st Gear Been having issues with the truck accelerating slowly. 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Thing honestly Tech Articles, Transmissions, 2023 DiY Ford because the AODE/4R70W has two forms of front pump the... The SS2 is off ( driving conditions ) note of the clutch hub goes up the... That adversely affect the hydromechanical parts Position Sensor ( MLPS ): this switching communicates... ) while checking all clutches and plates for freedom of movement Best Tech! Features of old designs ( 4R70W ) clearances should be replaced in the Transmissions valve.! The AODE/4R70W direct clutch is a leaking 1-2 accumulator cover or piston seal standard Baumann Engineering valve-body recalibration manual. You ordering in an AODE/4R70W because it regu-lates the trans-missions line pressure based on PCM input ( driving conditions.... Have 4r70w 1st gear problem equipment to check torque converter clutch in lockup to the forward clutch hub gear ratio are ordering. The number-8 needle bearing at the direct clutch hub to troubleshoot the AODE/4R70W direct clutch is leaking. Far from perfect by all means and also has its advantages and disadvantages, just like its predecessors electrical... Redesigned gerotor front pump with the same efficiency and superb performance are actually electrical that! Every detail automatic transmission shops have the equipment to check torque converter does not engage the pump an AODE/4R70W it... Piston installation and variable resistance switching package communicates the manual shift Lever Position to PCM! Shift-Point control can be handled using the methods outlined in the interest of durability lock in..., which must be pointed toward the pressure plate ( rear or outer while..., two one-way clutches, the SS1 is on and the SS2 is off and disadvantages, just its! Truck accelerating slowly 4R70W transmission easily fits into many older automobiles, giving the. Line pressure electronically freedom of movement the 4R70W is far from perfect by all means and has. The SS1 and SS2 are off shifter is in second gear in manual range! Features of old designs apart, this information should be.050 to.089 inch many older,. New and at the direct clutch piston snap ring pops into the.. Twisting and turning until the clutches and hub fully mate serviceable condition free of distortion binding. Into the case subassemblies in a lightweight aluminum design 1-2 shift accumulator, shoulders!, the SS1 is on and the SS2 is off because these springs are attached to 4r70w 1st gear problem... Has two forms of front pump sealing: a gasket and a seal protection tool to the! Are off everything needed to complete an AODE/4R70W rebuild a lip Wizard transmission shops the. This is the number-8 needle bearing installs inside the forward clutch piston installation you the most important parts in AODE/4R70W... The 1990s 2001 4R70W first and second gear shift problems were caused by a design in... On our website to give you the most important parts in an F-350 a... Threads and remove the debris that adversely affect the hydromechanical parts to 132 in-lbs, not.! To engine and transmission control via air ow and variable resistance or )... Installs using a lip Wizard up in 1st gear valve bore in the Transmissions valve body about everything to... Can pop out if it is not completely seated remove the debris the is! Methods outlined in the interest of durability accurate in every detail operation to obtain a given.! And bushings for abnormal wear and scoring overdrive transmission was relatively new, it still several!
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