TRNW Tech Tip of the Month

4L60E Cracked Reverse Drum
4L60E Reverse Drum
4L60E Rev. Drum (click to enlarge)

4L60E No Reverse!
We have built many 4L60Es but this one struck me as odd. This vehicle came in with no codes and a little over 200,000 miles on it. When we tore it down all the clutches looked great. It just had no reverse all at once.

Upon air testing the reverse input drum we could here a little more leaking than normal. We all know this drum doesn't air test super tight because of the design of the piston to wave plate seal. Upon close inspection we could see that the drum cracked in place we are not use to.

So I posted this just in case someone get one slipping in Rev. The way I found it was to fill the completely dry drum up with solvent where the piston goes, then I sucked the solvent out and tilted the drum and seen that solvent had leaked in between the drum in a drum. - more







TRNW Store

G-Tec Heated Cooler Line Flusher

G-Tec Heated Cooler Line Flusher

View Details
47RE Noise Filter

A618/47RE Noise Filter

View Details
GM Power Relay

GM Power Relay

View Details
AW Solenoid Service Tool

AW Solenoid Service Tool

View Details
Aisin Solenoid Bushings

Aisin Solenoid Bushings 100 Pack

View Details
VB-Fix Reaming Fixture

VB-Fix Reaming Fixture

View Details
Sonnax Vacuum Test Stand

Sonnax Vacuum Test Stand

View Details
Ford LED Brake Light Fix

Ford LED Brake Light Fix

View Details
Pressure Gauge Adapter Set

Pressure Gauge Adapter Set

View Details
SonnaFlow® Flow Meter Diagnostic Tool

SonnaFlow® Flow Meter Diagnostic Tool

View Details