Mustang GT V8-4.6L SOHC VIN X (1998)
Ring Gear: Testing and Inspection
If the ring gear runout check (before disassembly) exceeds specification, the condition may be caused by a warped ring gear, a damaged rear axle
housing, loss of differential bearing preload or debris between the ring gear back face and the case flange. Perform the following steps to determine
the cause of excessive runout.
1. With the pinion removed, place differential case/gear subassembly with differential bearings and differential bearing cups in rear axle housing.
2. Install a 6.75 mm (0.265 inch) differential bearing shim on the LH side of subassembly.
3. Install the LH bearing cap finger-tight.