Shift Kit

4T65E Transmission Shift Kit

The 4T65E includes a transmission shift kit that improves the shifting of any vehicle. It's designed for use with both non-HD and HD versions of the gearbox and takes approximately two hours to install.

The 4T65E includes a transmission shift kit that improves the shifting of any vehicle. It’s designed for use with both non-HD and HD versions of the gearbox and takes approximately two hours to install. Although there are some disadvantages, the positive aspects of a transmission upgrade outweigh them. Transmission upgrades can extend vehicle life and improve fuel economy, but they can also cause hard part failure. We do not recommend this kit for cars with 20″ wheels due to the risk of damaging an input shaft owing to additional rotational weight.

We found with many kits that there are no directions pertaining to shift firmness. Many users are left guessing how hard to set up their kits or wind up with a kit that shifts well on the first two gears but is too soft on the third and fourth. Because our kit has more shim sizes than our competitor’s, you may adjust the 1-2 and 2-3 shifts to four degrees of pressure using 4 levels of firmness for each shift. We provide a kit with the choices and instructions you need to get the best shift quality possible at a price that is reasonable.

A complete kit including a variety of shims, a new transmission filter, and thorough instructions is included. Because the trans pan gasket is made of rubber, it’s generally possible to reuse it.

4T65E Shift Kit: Installation Guide

Step 1

Begin removing the 10mm bolts on the transmission pan by raising the car’s front. Remove the screws that are closest to the back of the car rather than those closest to the front so that the fluid drains toward the long end of the pan. Allow it to almost fully drain, even if this will happen anyhow since it will make a bigger mess. It’s simply avoiding some hassle for you. Remove the pan and wipe off both it and the magnet and gasket.

Step 2

Remove the pan. We may now get to the filter. Twist it side to side to free it, then pull it straight down firmly. If necessary, replace the filter neck gasket.

Step 3

We can now take out the accumulator after it’s been removed from the filter. It’s in color and includes the screws that must be undone and numbered for easy reference. When these bolts are taken out, the accumulator will fall and spatter transmission fluid all over the place. Once they’re loose, use one hand to hold up the accumulator while using another to take out the bolts by hand. Remove the steel wires from the accumulator with care so you don’t bend them. Make a note of each metal line’s position.

Step 4

Remove the accumulator, place it face-up on a clean surface with the remaining bolts, and remove them. Remove the cover from the device. There are two cylinders inside, both of which have visible springs. Work on one side at a time. Remove spring by pulling up on it. Remove the small spring and metal plate it sits on while leaving the rod and major spring in place. Place a lengthier shim at the bottom of the rod. Remove the tiny spring from its base and replace it with the new spring if you’re using the optional 2-3 spring on the 1-2 accumulator. Remove the rod from the wall. Replace the small spring and base onto the rod. In the center of the spring, add a short shim. Repeat the same process for the alternative side.

Step 5

Replace the accumulator cover. Install it in the transmission carefully, reinstalling and reseating the hard metal lines as needed. Check to see that the lines have been reseated correctly. You’ll get a slipping transaxle that burns up clutches if they’re not.

Step 6

Reinstall the transaxle filter and add approximately 8 to 10 quarts of ATF. Replace the pan cover, then fill the transaxle with approximately 8 to 10 quarts of ATF, depending on how much fluid you lost. Make certain that the right fluid level has been obtained before taking the vehicle for a spin to ensure it isn’t slipping. When everything is in order, enjoy your new shift kit! Your wallet will be grateful to you for this!

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