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Clutch Plate Diagnosis

Clutch Plate Diagnosis

Composition Plates

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


• Pitting

• Flaking

• Delamination-splitting or separation of bonded clutch material

• 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 or apply plates

• Engine coolant or water 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 in between channels.

- The valve train retainers are improperly installed.

- The checkballs are misplaced.

• The Teflon® seal rings are worn or damaged.