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 R 10 P/U 2WD V8-454 7.4LFACTORY OEM SERVICE PROCEDURE
Differential
Spicer 8 7/8 Inch Ring Gear
Ring Gear & Pinion Backlash
shim adjustments, 0.004-0.009
Pinion Bearing Preload
New Bearing, 20-40 in.lb
Used Bearing, 10-20 in.lb
Differential Bearing Preload
New Bearing, 0.006 in
Used Bearing, 0.006 in
CHEVROLET 8 7/8 Inch Ring Gear
Ring Gear & Pinion Backlash
Adjustment Nut , 0.005-0.008
Pinion Bearing Preload "Spacer"
New Bearing, 25-35 in.lb
Used Bearing, 5-15 in.lb
Ring Gear & Pinion Backlash
shim adjustments, 0.004-0.009
Pinion Bearing Preload
New Bearing, 20-40 in.lb
Used Bearing, 10-20 in.lb
Differential Bearing Preload
New Bearing, 0.006 in
Used Bearing, 0.006 in
CHEVROLET 8 7/8 Inch Ring Gear
Ring Gear & Pinion Backlash
Adjustment Nut , 0.005-0.008
Pinion Bearing Preload "Spacer"
New Bearing, 25-35 in.lb
Used Bearing, 5-15 in.lb
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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