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 MANUALSCHEVROLET1987STEP VAN P20, 7.4 W, AUTOMATIC, 400/M40REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 45 (SERVICING - M/T)LUBRICATIONCHECKING FLUID LEVELTRANSFER CASE
1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40
Transfer Case
1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40SECTION Transfer Case
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 1988 GMC Vandura Special, 1988 GMC Vandura, 1988 GMC Value Van, 1988 GMC Suburban, and 1988 GMC Safari. However, it is still accessible from the selected car via links, so may be relevant.
Remove filler plug. Check oil level. If level is not up to filler plug opening, add lubricant until it is.
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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.