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.
1987 Chevrolet Hi-Cube 6.2 J, 400/M40FACTORY OEM SERVICE PROCEDURE
Auxiliary Valve Body: Disassembly
- Auxiliary valve cover is under spring tension. Carefully remove cover retaining bolts. Remove cover and spring. Remove piston and "O" ring. See Fig 1 . Press low-overrun clutch valve downward.
- Remove pin, spring and low-overrun valve. Remove pin, abuse valve stop, spring and abuse valve. DO NOT remove orifice plug unless it is damaged.
LEGEND FOR FIGURE 43
| Item No. | Description |
|---|---|
| 1 | Pin |
| 2 | Spring |
| 3 | Low-Overrun Clutch Valve |
| 4 | Auxiliary Valve Body |
| 5 | Orifice Plug |
| 6 | "O" Ring |
| 7 | Piston |
| 8 | Cover |
| 9 | Abuse Valve |
| 10 | Abuse Valve Stop |
| 11 | Piston Pin |
| 12 | Check Ball |
Factory Service Tools
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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.
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