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 MANUALSCHEVROLET1987S10/T10 P/U 2WD L4-151 2.5LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINDIFFERENTIAL ASSEMBLYDIFFERENTIAL CARRIERTESTING AND INSPECTIONGEAR TOOTH CONTACT INSPECTION
1987 Chevrolet S10/T10 P/U 2WD L4-151 2.5L
Gear Tooth Contact Inspection
1987 Chevrolet S10/T10 P/U 2WD L4-151 2.5LSECTION Gear Tooth Contact Inspection
Fig. 10 Gear Tooth Contact Inspection:
1. Ensure that ring gear is clean and free from oil, then coat coast and drive face of each ring gear tooth with suitable marking compound.
2. Brake ring gear to load gears, then turn pinion in order to rotate ring gear one full revolution in each direction. Satisfactory contact pattern cannot be obtained unless gears are loaded. Excessive rotation of gears is not recommended.
3. Inspect tooth contact pattern referring to Fig. 10, and correct assembly adjustments, as needed to obtain correct pattern.
4. Clean marking compound from gears.
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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.