Clutch Spin Down Time for GMC Truck GMC P42 Commercial Chassis 1999

Before disassembling the transmission, check the clutch and shift linkages to ensure the problem is in the transmission.

1. Raise the vehicle.
2. Move the extension housing up and down.
3. If the plate is loose on the crossmember, tighten the bolts.
4. If the rubber is split or spongy, replace the mount.

1. Run the engine at normal idle speed with the transmission in neutral and the clutch engaged.
2. Disengage the clutch, wait 9 seconds, and shift the transmission into reverse.
3. If a grinding noise is heard, check the clutch system. Refer to Clutch Noisy in Clutch.