4L60E Input Drum Leak Testing

This video by *Automatic Transmission* demonstrates how to **test a 4L60E transmission input drum for leaks**. The video shows how to use compressed air and a vacuum tester to check the seals on the drum and pistons. The presenter explains that leaking seals can cause the 3-4 clutch pack to burn up. He also shows how to repair a leaking drum by using JB Weld to seal the input shaft.

*In the video, Automatic Transmission:*
Shows how to identify a leaking input drum
Explains why it is important to check for leaks
Provides tips on how to repair a leaking drum
Demonstrates how to vacuum test the check ball in the piston

If you are rebuilding a 4L60E transmission, this video is a valuable resource that will help you understand how to properly test and repair the input drum.


SOMETIMES YOU MAY EXPERIENCE REPEATED 3RD CLUTCH FAILURE ON THESE UNITS. THIS IS ONE OF THE MANY REASONS YOU WILL EXPERIENCE THAT ISSUE IF NOT CORRECTED.