47. 3-4 Clutch Assemble
3-4 CLUTCH ASSEMBLEIMPORTANT: The part 654A may have 5, 6 or 7 plates.
1. Inspect the 3rd and 4th clutch apply plate (653), the fiber plate assemblies (654A), the steel plates (654B) and the selective backing plate (655) for the following conditions:
- Damaged tangs
- Delamination
- Excessive wear
- Heat damage or wear
- Surface finish
- Flatness
2. Install the 3rd and 4th clutch apply plate (653) into the input housing. Index each leg of the apply plate into the apply ring legs.
IMPORTANT:
- The first steel plate (654B) has the same spline configuration as the 3rd and 4th clutch apply plate (653).
- The M30 RPO 3-4 clutch plate stack up is 5 fiber plates, and 6 fiber plates on all other models. The M32 RPO (heavy-duty design) uses 7 fiber plates. These fiber plates are a thinner thickness which can not be used in a M30 stack up. M32 fiber plates must not be used in a M30 design.
NOTE: The correct number of fiber plates must be used to avoid damage to the transmission. An incorrect stack up height can cause either excessive clutch slippage or insufficient release resulting in burned clutch plates.
3. Install the 3rd and 4th clutch plates starting with a fiber plate assembly (654A) and alternate with a steel plate (654B).
4. Install the 3-4 clutch boost spring assemblies (600) into the input housing.
5. Install the 3rd and 4th clutch selective backing plate (655). Some models may have a chamber on one side of the selective backing plate. Install the chamfer side up.
6. Install the 3rd and 4th clutch backing plate retainer ring (656).