Ford 2003 Mustang Workshop Manual page 388

Setting pinion depth
7. NOTE: Apply only a light oil film on the differential pinion bearings before assembling the tools.
Assemble and position the following in the differential housing.
Part
Item Number
1 205-109
2 205-105
3 4630
4 205-129
5 205-110
6 4621
7 205-111
8. NOTE: This step duplicates final differential pinion bearing preload.
Description
Adapter for 205-S127 (T76P-4020-A9)
Adapter for 205-S127 (T76P-4020-A3) (1.612 inch
O.D.)
Rear (inner) pinion bearing
Adapter for 205-S127 (T79P-4020-A18) (1.1884
inch thick)
Adapter for 205-S127 (T76P-4020-A10) (1.7 inch
thick)
Front (outer) pinion bearing
Adapter for 205-S127 (T76P-4020-A11)