Item 13, Item 14, Item 18 and Item 26: Selective Snap Ring, Differential Bearing Shim, Differential Case and Differential Bearing Assembly Note: Notes
WARNING: This page is about a different car, the 2003 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
- Install the special tools on the differential case.
- Place the differential case with the special tool in the differential housing.
- Position the special tool on the differential case in the differential housing.
- Install a unique set-up selective snap ring with a thickness of 0.100 inches.
- Position the special tool.
- Measure the total end play.
- Attach the special tools and position the indicator tip on the machined surface of the differential case flange.
- Move the differential case to the left and the right (as far as possible).
- Record the reading in Line A.
Differential Bearing Shim Selection Chart
To determine the snap ring thickness, add lines C, D and E (Example: 0.037 + 0.016 + 0.100 = 0.153 snap ring thickness).
To determine the bearing shim thickness, add lines A, F and G. Subtract line C and D from the sum. Example:
- 0.230 + 0.100 + 0.012 = 0.342
- 0.342 - 0.037 - 0.016 = 0.289 bearing shim thickness
- Remove the Dial Indicator and the differential case from the differential housing.
- Install the differential ring gear.
- Place the differential ring gear on the differential case.
- Hand start three bolts to align the holes in the differential ring gear and the differential case.
- Place the differential case and differential ring gear onto the press bed blocks with the differential ring gear teeth facing downward.
- Press the differential ring gear into place.
- Install the remaining bolts.
- Place the differential case with the special tool into the differential housing.
- Install the special tool.
- Measure the end play.
- Attach the special tool and position the indicator tip on the machined surface of the differential case flange.
- Rock the differential ring gear to allow full mesh with the drive pinion gear.
- With the gears in full mesh, set the special tool to zero.
- Move the differential case as far as possible to the left and note the reading.
- Record the reading on the differential bearing shim selection procedure Line B.
- Remove the special tool.
- Remove the differential case from the differential housing.
- Remove the bolts. Apply stud and bearing mount to the bolt threads, and reinstall the bolts.
- Press the left and right differential bearing on the differential case.
- Place the differential case and bearing cups in the differential case.
- Place the selective snap ring in the differential housing.
- Position the differential bearing shim indicated by the bearing shim selection chart.
- Using the special tools, seat the differential bearing shim in the differential housing.
- Install the differential bearing cap in the original location and tighten the bolts.
- Using the special tools, measure the differential ring gear backlash at four equally spaced points.
- Attach the special tool.
- Position the special tool tip centrally on a drive tooth.
- Zero the indicator.
- Turn the differential ring gear without turning the drive pinion gear. Record the indicator reading. The allowable backlash is 0.127 mm (0.005 in) to 0.228 mm (0.009 in) and must not vary more than 0.076 mm (0.003 in) between points measured. A backlash variation of more than 0.076 mm (0.003 in) between points checked indicates gear/case runout.
If backlash is within specifications, install the differential assembly.
To correct for a high or low backlash, proceed as follows.
- To correct for high or low backlash, increase or decrease the thickness of the differential bearing shim and decrease or increase the thickness of the selective snap ring by the same amount. Refer to the following tables when adjusting the backlash. When the backlash is within specifications, install the differential assembly.
NOTE:
Repeat this step until obtaining a consistent reading.
NOTE:
Select the correct size selective snap ring using the differential bearing shim selection chart.
NOTE:
To determine the thickness of the snap ring to be used, subtract Line B from Line A. Add Lines D and E to the difference. This is the thickness of the snap ring required.
NOTE:
Select the correct size selective bearing shim using the differential bearing shim selection chart.
NOTE:
To determine the thickness of the bearing shim to be used, add Lines A, F and G. Subtract Lines C and D from the sum. This is the thickness of the bearing shim required.