Ford 2003 Mustang Workshop Manual page 2750

29. Apply a 3.2-mm (1/8-in) bead of silicone rubber to the sealing surface on the extension housing.
30. Install the detent ball, the shifter detent spring, and the gearshift offset lever.
1. Coat the shifter detent spring with petroleum jelly and install it in the gearshift offset lever.
2. Lubricate the detent plate and install the detent ball in the neutral position on the plate.
3. Position the gearshift offset lever in the extension housing with the gear shift interlock
spring over the detent ball.
31. CAUTION: To prevent component damage, the alignment tab on the reverse brake
ring must align with the alignment slot in the extension housing.
NOTE: Verify that the oil pick-up funnel engages the fifth gear synchronizer.
Slide the gearshift offset lever and the extension housing into place as an assembly. Press
downward on the gearshift offset lever to compress the shifter interlock spring and push the
gearshift offset lever and extension housing into place.