For 1990-2009 cars only
Input Internal Ring Gear Inspection for GMC Truck TopKick C-Series (Conventional) C4/C5 2004
- Inspect the external splines of the input internal ring gear (1) for notching.
- Replace the ring gear if detectable notching has occurred.
Important: Clutch plate movement can cause notching on the external splines of the input internal ring gear.
