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 39 (AUTOMATIC TRANSAXLE OVERHAUL & TESTING - 4T65-E)TRANSAXLE DISASSEMBLYREVERSE BAND SERVO
1999 GMC Forward Control 5.7 R, Automatic
Reverse Band Servo
1999 GMC Forward Control 5.7 R, AutomaticSECTION Reverse Band Servo
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2003 Pontiac Montana, 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Pontiac Aztek, and 2003 Oldsmobile Silhouette. However, it is still accessible from the selected car via links, so may be relevant.
- Using long screwdriver, depress reverse band servo cover by prying against holding fixture. Pry retaining ring from reverse band servo cover. See Fig 1.
- Remove screwdriver. Servo assembly will push servo cover up. Using small screwdriver, pull servo cover "O" ring seal out through slot in case. Cut servo "O" ring seal. Depress reverse band servo cover. Grasp one end of cut seal and pull from servo cover. Servo assembly will push servo cover up. Remove servo cover, reverse band servo assembly and reverse band servo piston return spring. See Fig 2.
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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.