7.5 Inch Ring Gear
REMOVAL1. Raise and support the vehicle.
2. Remove the wheel and tire assemblies.
3. Remove the brake drums.
4. Remove the rear stabilizer bar.
5. Disengage the brake lines from the clips on the axle housing.
6. Remove the hydraulic brake T-fitting bolt from the axle housing.
NOTE: Do not open the hydraulic brake system lines.
7. Position a drain pan under the axle housing cover.
8. Remove the axle housing cover screws and the axle housing cover and allow the lubricant to drain from the rear axle assembly. Clean and remove all the gasket material from the axle housing cover.
9. Remove the axle shafts.
10. Remove the four nuts and bolts from each brake backing plate to the axle housing flange.
11. Support each backing plate with wire.
12. Disconnect the rear anti-lock brake sensor electrical connector.
13. Disconnect the vent from the axle housing.
14. Remove the driveshaft-to-rear axle companion flange bolts and separate the driveshaft from the companion flange.
NOTE: Scribe marks on the driveshaft end yoke and on the rear axle companion flange to ensure proper position of the driveshaft at installation.
15. Position the driveshaft out of the way and support it with wire.
16. Support the rear axle assembly with a jack.
17. Remove the lower nut and bolt from each rear shock absorber and swing the lower end free of the mounting bracket on the axle housing.
18. Remove the nuts from the LH and RH spring U-bolts and drive the U-bolts from the rear spring plates.
19. Lower the rear axle assembly and carefully remove it from the vehicle.
INSTALLATION
1. Raise the rear axle assembly and carefully position it to the vehicle.
2. Install the rear spring plates, the LH and RH spring U-bolts, and the U-bolt nuts. Tighten the U-bolt nuts to 88-118 Nm (65-80 ft. lbs.).
3. Position each rear shock absorber to the mounting bracket on the axle housing and install the lower nuts and bolts. Tighten the shock absorber lower bolt nuts to 53-72 Nm (39-53 ft. lbs.).
4. Connect the driveshaft end yoke to the rear axle companion flange, making sure to verify that the marks made during removal align, and that the driveshaft is installed in its original position.
5. Apply Loctite Stud and Bearing Mount EOAZ-19554-BA or equivalent meeting Ford specification WSK-M2G349-A1 to the threads of the driveshaft end yoke-to-rear axle companion flange bolts. Tighten the bolts to 95-128 Nm (70-95 ft. lbs.).
6. Position the hydraulic brake T-fitting bolt to the axle housing and install the bolt. Tighten the hydraulic brake T-fitting bolt securely.
7. Install the brake lines to the clips on the axle housing.
8. Position the brake backing plates to the axle housing flanges and install the four nuts and bolts. Tighten the brake backing plate-to-axle housing nuts to 27-54 Nm (20-40 ft. lbs.)
9. Apply Loctite Stud and Bearing Mount EOAZ-19554-BA or equivalent meeting Ford specification WSK-M2G349-A1 to the threads on the axle housing vent. Install the vent to the axle housing.
NOTE: Make sure that the axle vent is not plugged with debris.
10. Install the rear stabilizer bar.
11. Connect the rear anti-lock brake sensor electrical connector.
12. Install the axle shafts.
13. Apply a new continuous bead of Silicone Rubber Sealant D6AZ-19562-BA or -AA or equivalent meeting Ford specification ESB-M4G92-A or ESE-M4G 195-A to the axle housing cover.
CAUTION: Make sure that the machined surface on the carrier is clean and free of the gasket material before installing the axle housing cover. The inside of the rear axle assembly must be covered when cleaning the machined surface to prevent contamination.
14. Tighten the axle housing cover screws to 38-52 Nm (28-38 ft. lbs.).
15. Install the brake drums.
16. Install the wheel and tire assemblies. Tighten the lug nuts to 115-156 Nm (85-115 ft. lbs.).
17. Remove the rear axle assembly fill plug and add Premium Rear Axle Lubricant XY-80W90-OL or equivalent meeting Ford specification WSP-M2C197-A until the lubricant level is 6-14 mm (1/4-9/16 inch) below the bottom of the fill hole. Add 4 ounces of Friction Modifier C8AZ-19B546-A or equivalent meeting Ford specification EST-M2C118-A for Traction-Lok9 rear axle assembly. Install the fill plug and tighten to 20-41 Nm (15-30 ft. lbs.).
18. Lower the vehicle.