Differential Case: Installation
WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Press the ring gear and, if removed, a new anti-lock speed sensor on the differential case.
- Install the bolts.
- Apply Stud and Bearing Mount EOAZ-19554-BA or equivalent meeting Ford specification WSK-M2G349-A1 to the ring gear bolts.
- With pinion depth set and the pinion installed, place the differential case in the rear axle housing.
- Install a shim on the left side.
- Install the left bearing cap, and loosely install the bearing cap bolts.
- Install progressively larger shims on the right side until the largest shim selected can be assembled by hand.
- Install the right side bearing cap, and tighten the bolts.
- Rotate the differential case to make sure it rotates freely.
- Using the special tool, measure ring gear backlash.
- If the backlash is within specification, go to BACKLASH WITHIN SPECIFICATION in this procedure. The specification shown in the illustration is the total allowable range. For the preferred range, refer to the SPECIFICATIONS portion of this article.
- If a zero backlash condition occurs, go to ZERO BACKLASH in this procedure.
- If the backlash is not within specification, go to Backlash Not Within Specification in this procedure.
- If a zero backlash condition occurs, add a 0.50-mm (0.020-inch) shim to the RH side and subtract 0.50 mm (0.020 inch) from the LH side to allow backlash indication. Check backlash. Go to MEASURE BACKLASH in this procedure.
- To increase or decrease backlash, remove the bearing caps, and install a thicker shim and a thinner shim as shown.
- If backlash is not within specification, correct by increasing the thickness of one differential bearing shim and decreasing the thickness on the other differential bearing shim by the same amount.
- Install the bearing caps and bearing cap bolts.
- Rotate the differential several times to make sure the differential bearings are correctly seated.
- Using the special tool, recheck the backlash.
- If backlash is within specification, go to Backlash Within Specification in this procedure. If not, go to Measure backlash in this procedure.
- The specification shown in the illustration is the total allowable range. For the preferred range, refer to the SPECIFICATIONS portion of this article.
- Remove the bearing caps and bolts.
- To establish differential bearing preload, increase both left and right shim sizes by the specification shown in the illustration.
- Using the special tool, make sure the differential bearing shims are fully seated and the assembly turns freely.
- Install the bearing caps and bearing cap bolts.
- Use the special tool to verify the backlash.
- The specification shown in the illustration is the total allowable range. For the preferred range, refer to the SPECIFICATIONS portion of this article.
- Install the axle shafts. For additional information, refer to AXLE SHAFT .
ALL VEHICLES
CAUTION:
Make sure that the notches on the case flange and the anti-lock speed sensor ring are aligned.
CAUTION:
Mark the position of the bearing caps as arrows may not be visible. The bearing caps must be installed in their identical locations and position.
NOTE:
Apply pressure toward the left side to make sure the left bearing cap is seated.
MEASURE BACKLASH
ZERO BACKLASH
BACKLASH NOT WITHIN SPECIFICATION
BACKLASH WITHIN SPECIFICATION