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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 32 (DRIVE AXLES)REMOVAL & INSTALLATIONOUTPUT SHAFT SEAL REPLACEMENTINSTALLATION

1999 GMC Forward Control 5.7 R, Automatic

Output Shaft Seal Replacement: Installation

1999 GMC Forward Control 5.7 R, AutomaticSECTION Installation

WARNING: This page is about a different car, the 2003 Chevrolet Corvette and 2002 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Using the Output Shaft Seal Installer (J 36797), install the differential output shaft seal. Install the axle shaft. See AXLE SHAFTS . Install the rear tire and wheel assembly. Tighten wheel lug nuts to specification. See TORQUE SPECIFICATIONS . Lower the vehicle.

RENDER: 1.0x

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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.