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 MANUALSCHEVROLET1987HI-CUBE 6.2 J, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONMANUAL TRANSOVERHAUL - GM 76 MM 3 & 4-SPEEDCOMPONENT DISASSEMBLY & REASSEMBLYTRANSMISSION CASE COVERREASSEMBLY (4-SPEED MODELS)
1987 Chevrolet Hi-Cube 6.2 J, 400/M40
Reassembly (4-Speed Models)
1987 Chevrolet Hi-Cube 6.2 J, 400/M40SECTION Reassembly (4-Speed Models)
- With detent spring tang projecting up over 1st-2nd shifter shaft opening, install 3rd-4th detent cam on detent cam pivot pin. See Figure . With detent spring tang projecting up over 3rd-4th shifter shaft opening, install 1st-2nd detent cam on detent cam pivot pin.
- Install detent cam retaining "C" ring to pivot pin. Hook detent spring in detent cam notches.
- Hold reverse detent spring and ball in cover. Install reverse shift shaft.
- Install 1st-2nd and 3rd-4th shift forks on shifter shaft assemblies. Lift detent cam to allow forks to fully seat. Install outer shift levers, flat washers, lock washers and bolts. Install cover assembly.
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.