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.
1982 GMC Magnavan Standard TransFACTORY OEM SERVICE PROCEDURE
Grind Complete
WARNING: This page is about the Magnavan Automatic Trans, Trans Mfr CD 400/M40, which is a different variant/trim than selected.
Includes: Remove carbon, check surfaces for warpage, reface or replace Valves, resurface Valve Seats and clean Valve Guides. Adjust Valves (where applicable).| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| G3500,V8,Gas,5.7L Eng | 14.5 | 9.7 | A | |
| Additional Procedure: VALVE: Grind Complete: | ||||
| G3500,V8,5.7L Eng, Where Pwr Strg interferes add,Left Side or Both | 0.3 | 0.3 | A | |
| G3500,V8,Gas, Where Air Cond interferes add,One Side or Both | 0.6 | 0.6 | A | |
| Where Air Pump interferes add | 0.2 | 0.2 | A | |
| Where Cruise Control interferes add | 0.2 | A | ||
| Where Elect Eng System interferes add | 0.5 | A | ||
| Combination Procedure: ROCKER ARM STUD: Remove & Replace: | ||||
| Each Additional | 0.2 | B | ||
| One | 0.3 | B | ||
| Combination Procedure: VALVE LIFTERS: Remove & Replace: | ||||
| V8, All | 0.5 | B | ||
| Combination Procedure: VALVE LIFTERS (REMOVED): Clean: | ||||
| Each Additional | 0.1 | B | ||
| One | 0.2 | B | ||
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.