You also block the 2-3 accumulator feed hole in the valve body. I used muffin pans to keep all the little pieces parts organized. Deep cast aluminum pan is standard. It drops down one friction at a time until fully seated; this may take several minutes. Step 3: Note Inner Spring The low band apply servo also contains an accumulator.
Even though it slips, it still squawks the tires when it does shift. The drum is now ready to install in the case. Step 3: Remove Outer Shaft Remove the outer shaft that splines into the sun gear. Installing the teflon rings requires a protector to prevent cutting or gouging them, and a sizing device. If using a valve body with engine braking, be sure you install the intermediate band.
Install the snap ring and check clutch pack clearance. You will install the rear thrust bearing into the case or the stock selective spacer in the case with the stock thrust bearing on the rear planet using assembly gel or petroleum jelly to hold in place. There's also a roller thrust bearing for the output shaft to case to replace the washer, you may or may not want to add it. It requires you to lift by the center shaft, you cannot lift it by the center support as it will slide out of the reaction carrier. Drive from the front and seat the bushing flush with the upper edge of the bore. Grind a flat spot on the large spool valve land with arrow pointed at it.
Drive in a new bushing and seal. . Time saving tips are part of every buildup. This improves sealing at the sealing rings, reduces gear noise, improves transmission shift function, and increases transmission life. This holds the parking pawl out of the way so the transmission output shaft and lower assembly parts can be installed. I see aluminum pumps at summit or jegs for around 100. Install the center support into the reaction carrier.
Use a small screwdriver, if needed, to depress the retainers. A 34 element sprag, offroad specific clutch materials, lubrication modifications, and torrington bearing upgrades are added. Solid teflon is used on 4L80's and is interchangeable. Then all the weight is on your fingers for a few seconds. Note the direction the plastic drive gear teeth. This type of seal is far superior to the early-style O-ring seals because they simply do not leak. Be sure to lube the seal before re-installing, and take care not to cut it on the edges of the shifter shaft.
The pump is the heart of the transmission and most overlooked part for rebuilders. I've not yet done the work, but have read the manual and appreciate the author having taken the mystery out of automatic transmissions. Slide the reaction carrier onto the rear planet assembly, drop in the sun gear, flat side toward the front of trans. I install the part of the rear servo to help hold the band in place. Use selective shims under the Torrington bearing, or selective washers and shims to correct the pump endplay to within specifications.
The pump is so simple, but taken for granted far too often. And since the Turbo 400 does not rely on computer controls, it was adapted to a wide range of configurations. It was first used in Buick and Cadillac applications, and was quickly adapted to other models. This allows access to the two sets of Torrington bearings, and to replace the output shaft upper bushing. I want it to utilize the power more efficiently, so I'll be putting in a new converter as well. This is a welcome addition to your automotive library. Now you will need to lift the rear assembly and install.
At least if I have trouble I'll know where to look and how to communicate the problems to someone else now! Step 6: Adjust Feed Hole Important! Step 6: Install O-Ring If used, install a new O-ring onto the output shaft. Additionally we use 300M input shaft with larger splines in the forward drum, 300M alloy intermediate shaft, and billet alloy steel forward hub. One of the keys is to keep line pressure under 250 psi if possible. It was designed to prevent engine damage. If the case is worn, find another case.
Do not overtighten this bolt; it can be easily broken off in the valve body. These can be mixed with thinner steels used in forward drum when setting clearance. Compress the assembly and install the snap ring, with the flat side facing up. Installing the teflon rings requires a protector to prevent cutting or gouging them, and a sizing device. I welded a handle onto a old sprag outer race to use as an alignment tool for the intermediate frictions. Step 10: Install Drum Seal Install the back-up seal onto the direct drum, with the lip facing up.