GM Service Manual Online
For 1990-2009 cars only

Composition Plates

Dry and inspect the plates for the following conditions :

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

Replace the 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 colorsmear is indicated, you can reuse the plate. If the plate is discolored with hot spots or if the surface is scuffed, replace the plate.

Causes of Burned Clutch Plates

Important: If the clutch shows evidence or extreme heat or burning, replace the springs.

The following conditions can result in a burned clutch plate:

    • Incorrect usage of clutch plates
    • Engine coolant in the transaxle fluid
    • A cracked clutch piston
    • Damaged or missing seals
    • Low line pressure
    • Valve problems
       - The valve body face is not flat
       - Porosity between channels
       - The valve bushing clips are improperly installed.
       - The check balls are misplaced.
    • The seal rings are worn or damaged.