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)COMPONENT DISASSEMBLY & REASSEMBLYACCUMULATOR COMPONENTSINSPECTION
1999 GMC Forward Control 5.7 R, Automatic
Accumulator Components: Inspection
1999 GMC Forward Control 5.7 R, AutomaticSECTION Inspection
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.
- Inspect accumulator housing, accumulator cover spacer plate and accumulator cover for the following:
- Damaged oil pipe holes in accumulator cover.
- Damaged, improperly machined or porous accumulator cover.
- Bent or damaged accumulator cover spacer plate.
- Stripped or damaged bolt holes in accumulator housing.
- Damaged, worn, improperly machined or porous accumulator housing.
- Leaking, loose or missing cup plugs in accumulator housing.
- Inspect accumulator pistons, springs, seals and pins for the following:
- Broken or collapsed piston outer springs.
- Broken or collapsed piston cushion springs.
- Bent or worn accumulator piston pins.
- Damaged, worn or porous accumulator pistons.
- Damaged accumulator piston seals.
- Inspect servo and lube oil pipe components and 2-1 manual band servo cover for the following:
- Damaged lube, and servo oil pipe holes in servo cover.
- Damaged, improperly machined or porous servo cover.
- Bent, plugged or damaged lube and servo oil pipes.
- Plugged or damaged lube oil hose.
- Damaged hose clamps and/or lube oil pipe retainer.
- Missing lube oil pipe washer.
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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.