Mustang GT V8-4.6L SOHC VIN X (1998)
Align mark on rear axle universal joint flange with mark on pinion shaft. Install rear axle universal joint flange.
6. Install a new pinion nut on pinion shaft (apply small amount of lubricant on washer side of nut).
7. Hold the circular rear axle universal joint flange with Companion Flange Holding Tool 205-126 (T78P-4851-A) while tightening nut.
8. Rotate pinion occasionally to make sure proper bearing seating. Take frequent pinion bearing torque preload readings while tightening, until
original recorded preload reading is obtained.
9. If original recorded preload is less than specification, tighten to specification. If preload is higher than specification, tighten to original reading as
recorded.
Never back off pinion nut to reduce preload. If reduced preload is required, install new differential drive pinion collapsible spacer and pinion nut.
10. Remove oil seal replacer tool from transmission extension housing. Install front end of driveshaft on transmission output shaft.
11. Connect rear end of driveshaft to rear axle universal joint flange, aligning scribe marks on driveshaft and rear axle universal joint flange. Tighten
the four bolts to 95-130 Nm (70-95 ft. lbs.).
12. CAUTION: Overfilling axles may cause seal and axle leakage.
Fill axle with SAE 8OW-90 Premium Rear Axle Lubricant XY-8OW90-QL or equivalent meeting Ford specification WSP-M2C197-A until fluid
level is within 6-14 mm (0.250-0.562 inch) below bottom of fill hole with the axle in operating position. Add 118 ml (4 ounces) of Additive
Friction Modifier C8AZ-1913546-A or equivalent meeting Ford specification EST-M2C118-A for Traction-Lok axles. Install oil filler plug.
Tighten to 20-41 Nm (15-30 ft. lbs.).
13. Make sure rear axle housing vent is not plugged with debris.
