Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1985CHEVY VAN G30, 5.7 M, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL - THM 400COMPONENT DISASSEMBLY & REASSEMBLYFORWARD CLUTCHDISASSEMBLY
1985 Chevrolet Chevy Van G30, 5.7 M, 400/M40
Forward Clutch: Disassembly
1985 Chevrolet Chevy Van G30, 5.7 M, 400/M40SECTION Disassembly
- Place forward clutch assembly in Adapter and Holding Fixture (J-21364 and J-6116-01) with turbine shaft pointing down. Remove forward clutch housing-to-direct clutch hub snap ring and withdraw hub. Remove forward clutch hub and one thrust washer from each side of hub. See Fig 1.
- Remove composition and steel clutch plates. Place forward clutch assembly in press with turbine shaft pointing down. Using Clutch Spring Compressor and Adapter (J-4670-01 and J-21664), compress spring retainer and remove snap ring. Remove tools. Lift out spring retainer and 16 clutch release springs.NOTE: Keep forward clutch release springs separate from direct clutch release springs.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.