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.
1990 Chevrolet APVFACTORY OEM SERVICE PROCEDURE
Manual Transmissions
MANUAL TRANSMISSION APPLICATION
| Model | Transmission Model | |
|---|---|---|
| "C" & "K" Series | ||
| Standard | Muncie 85 MM 4 & 5-Speed (MCO & MG5) | |
| Heavy Duty | Muncie 117 MM 4-Speed (M20) | |
| "G" Series | New Process 89 MM 4-Speed Overdrive (MY6) | |
| Astro, Safari, "S" & "T" Series | BW 77 MM 5-Speed Overdrive (ML2/3) | |
| "P", "R" & "V" Series | Muncie 117 MM 4-Speed (M20) | |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.