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 REASSEMBLYTRANSMISSION-TO-TRANSFER CASE END PLAY CHECK
1999 GMC Forward Control 5.7 R, Automatic
Transmission-To-Transfer Case End Play Check
1999 GMC Forward Control 5.7 R, AutomaticSECTION Transmission-To-Transfer Case End Play Check
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.
NOTE:
ATF circulates between transaxle and transfer case. In situations where transaxle related failures circulate debris into transfer case, transfer case must be disassembled, cleaned, and inspected for damage.
- Position transaxle so case side cover is facing down. Install final drive sun gear shaft. See Figure. Use petroleum jelly to retain parking gear thrust bearing to parking gear. Install parking gear thrust bearing and parking gear. See Figure. Install final drive sun gear. See Figure.
- Install bolts to end play checking tool and tighten securely to prevent tool deflection during end play measurement. See Figure. Hand tighten end play checking tool to remove end play. Install gauge bar onto case mounting surface.
- Measure distance from case mounting surface, bottom of gauge bar to top of final drive sun gear. See Fig 1. This measurement is dimension "A". Remove gauge bar and end play checking tool.
- Install gauge bar onto carrier. Measure distance from bottom of gauge bar to transfer case. See Fig 2. This measurement is Dimension B1. Measure distance from bottom of gauge bar to thrust bearing. See Fig 3. This measurement is Dimension B2. Subtract Dimension B2 from Dimension B1. This is Dimension "B". For available thrust washer sizes, refer to illustration. See Fig 4.
- Remove gauge bar from transfer case. Remove final drive sun gear. Install selective washer. See Figure. Install final drive sun gear. See Figure.
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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.