Thread: 4T65E End Play question?

The final drive endplay is seperate from the overall unit endplay. When setting the main endplay via shim under the bearing on the input clutch drum you need to push the differential towards the transmission to take all of the slack or endplay out of that section. The easiest way to do this without the preload tool showed in the instructions is by having the final drive/differential and tail housing already set up and installed and the transmission standing on this end so the main line of the transmission points straight up and down. Then you can use a flat blade screwdriver or small prybar to pry upwards on the final drive by inserting it through the speed sensor hole in the tail housing. While prying up on the final drive you will check the main line endplay which without the special tool to measure this you will lay a straight edge across the case and use a feeler gauge to measure the difference from the case edge to the top surface of the driven sprocket support and adjust accordingly.

Glad I could help out. The sun gear shaft does push up on the geartrain inside the trans which is why you need to push the final drive inwards to compensate for its endplay. If you just push up on the shaft without the final drive in place it can push in further and give an incorrect reading, that is why the tech manual shows having the final drive end play set first and already assembled.