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 MANUALSGMC1989S15/T15 2WD P/U L4-151 2.5LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSDIFFERENTIAL ASSEMBLYREAR AXLENON-LOCKING DIFFERENTIAL10-1/2 INCH RING GEARAVAILABLE SHIM SIZES
1989 GMC S15/T15 2WD P/U L4-151 2.5L
Available Shim Sizes
1989 GMC S15/T15 2WD P/U L4-151 2.5LSECTION Available Shim Sizes
10 1/2-INCH RING GEAR
PINION BEARING SHIMS:
0.006-inch
0.007-inch
0.008-inch
0.009-inch
0.010-inch
0.011-inch
0.012-inch
0.013-inch
0.014-inch
0.015-inch
0.016-inch
0.017-inch
0.018-inch
0.019-inch
0.020-inch
0.021-inch
0.022-inch
0.023-inch
0.024-inch
RENDER: 1.0x
NO RELATED
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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.