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 70 (AUTOMATIC TRANSMISSION SERVICING)REMOVAL & INSTALLATIONCASE EXTENSION HOUSING (4T65-E)INSTALLATION
1999 GMC Forward Control 5.7 R, Automatic
Case Extension Housing (4T65-E): Installation
1999 GMC Forward Control 5.7 R, AutomaticSECTION Installation
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Install the washer and the thrust bearing onto the final drive assembly. Use the Transmission Assembly Lubricant (J-36850) or the equivalent (petroleum jelly), in order to retain the washer and the bearing. Install the seal and the case extension. See Figure .
- Check the final drive end play. See appropriate OVERHAUL article in AUTOMATIC TRANSMISSION. Install transaxle brace. See Figure . Install the case extension housing bolts. Install the transaxle brace bolts. Tighten the case extension housing bolts to specification. Tighten the transaxle brace bolts to specification. See TORQUE SPECIFICATIONS .
- Install the right drive axle to the transaxle. See appropriate article in DRIVE AXLES. Install the right front tire and wheel assembly. Install the vehicle speed sensor. See VEHICLE SPEED SENSOR (4T65-E) . Lower the vehicle.
- Fill transaxle with appropriate fluid to proper level. See LUBRICATION . Inspect for fluid leaks.
CAUTION:
Carefully guide the axle shaft past the lip seal. The splined portion of the axle can cut the seal.
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.