Clutch Plate Diagnosis

4L60-E/4L65-E

Clutch Plate Diagnosis

Composition Plates
Dry the plates and inspect the plates for the following conditions:

* Pitting
* Flaking
* Wear
* Glazing
* Cracking
* Charring
* Chips or metal particles embedded in the lining

Replace a composition plate which shows any of these conditions.

Steel Plates
Wipe the plates dry and check the plates for heat discoloration. If the surfaces are smooth, even if color smear is indicated, you can reuse the plate. If the plate is discolored with heat spots or if the surface is scuffed, replace the plate.

Causes of Burned Clutch Plates
The following conditions can result in a burned clutch plate:

* Incorrect usage of clutch plates
* Engine coolant in the transmission fluid
* A cracked clutch piston
* Damaged or missing seals
* Low line pressure
* Valve body conditions
- The valve body face is not flat.
- Porosity is between channels.
- The valve bushing clips are improperly installed.
- The checkballs are misplaced.

* The Teflon seal rings are worn or damaged.