Synthetic fluids behave much better at extreme temperatures both hot and cold and will not break down as quick as their organic counterparts. On the bench is the direct clutch, which delivers power to the output shaft. It should also be noted that at temperatures as low as 240 degrees, the organic transmission fluid can turn to varnish. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. The pressure ports on the driver's side.
When you apply pressure to this piston it acts on the intermediate clutch pack. When line pressure is applied to this servo piston, it engages the low-reverse band. If the spring is missing and cannot be found, replace the seal. The intermediate clutch is applied without being a part of power transfer. Look under the vehicle for external leaks. At the far right near the shifter is the pressure control solenoid connection D.
Most automotive parts stores will scan for free although a high quality aftermarket scan tool may be needed to display some transmission codes. Processor Outputs Electronically triggered solenoids are simple electromagnets. The filter should never be cleaned and returned to service. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. Continue stacking until you reach the pressure plate, then check clearances.
The Direct Clutch pack is the last one to come out of the transmission during disassmebly, so plan on a complete overhaul while it is apart. Tighten the cable nut until it's snug. Also install the input shaft sealing rings at this time. When the second oil cri-sis arrived in 1979, it brought with it increased fuel-economy standards imposed by the federal government. Step 3: Install Intermediate One-Way Clutch This is the intermediate one-way clutch installed. Staggering these gaps helps contain line pressure at the source. However, for the sake of longevity, replace yours.
The automatic is known as the 4R70W. The planetary one-way clutch overruns. These bearings may be located on the main shaft, countershaft or input shaft. Sooner or later, due to high mileage or abuse, you will be faced with the decision to replace the 4R70W transmission in your Ford F150 pickup truck. Step 8: Install Reverse Clutches The reverse clutch discs alternate with plates.
Final Assembly Step 1: Inspect Valve Body Examine all valve body passages, valves, and springs for obstructions or binding issues. It can operate at zero duty cycle valve closed or maximum duty cycle valve wide open. Start the engine and allow it to reach operating temperature. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. Do not get this backward.
The 4R70W is used in many vehicles developed by Ford. Ford fitted these internals to a fresh cast-aluminum case with an overdrive unit. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. If you encounter any binding, chase the threads and remove the debris. If it is dark red, brown or black, you need a fluid and filter change.
Stall testing is hard on the engine and transmission and can cause a borderline failing part to fail. Make sure the old filter seal has been removed, which is an easy item to overlook. Is your truck telling you the transmission has overheated? The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied acceleration. It's also the first thing your should check if the transmission is misbehaving. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. Click the button below and we will send you an exclusive deal on this book. Locate the cable to manual valve lever nut.
What makes torque converter installation so important is getting the torque converter fully seated on the stator, main input shaft, and this smaller lockup shaft. This will place the manual valve into the drive position. Depress the brake pedal and place the transmission into gear. I don't want to overfill it either. Heat and broken parts will shorten the life of your fluid, but in general, your transmission fluid will last the life of your truck. Did the problem arise after transmission service or part replacement? The illustrations aren't great, but I'm just trying to figure out why the dipstick would read full and I'd still have slipping when I go up hills.