Clutch Plate Diagnosis

Clutch Plate Diagnosis
Composition Plates
Dry the plate 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 hot spots or if the surface is scuffed, replace the plate.

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

Causes of Burned Clutch Plates
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

Engine Coolant in Transaxle

CAUTION: Antifreeze will deteriorate the O-ring seals and the glue used to bond the clutch material to the pressure plate. Both conditions may cause transaxle damage.

Perform the following steps if the transaxle oil cooler has developed a leak, allowing engine coolant to enter the transaxle:
1. Because the coolant will attach to the seal material causing leakage, disassemble the transaxle and replace all rubber type seals.
2. Because the facing material may become separated from the steel center portion, replace the composition faced clutch plate assemblies.
3. Replace all nylon parts including washers.
4. Replace the torque converter.
5. Thoroughly clean and rebuild the transaxle, using new gaskets and oil filter.
6. Flush the cooler lines after you have properly repaired or replaced the transaxle.