Example – Spicer Single Speed Axle - Service Manual User Manual
Page 22
3-13
WORKSHEET FOR CALCULATING RING GEAR BACKLASH
AND DIFFERENTIAL BEARING PRELOAD SHIMS
(1)
Total amount of space measured without ring gear as
shown in step 41, figure 3-40
Measurement A
(2)
Total amount of space measured with gear set assembled
in carrier as shown in step 44, figure 3-43
Measurement B
(3)
Measurement A minus Measurement B equals calculated
Measurement C
After the measurements and calculations have been made, assemble the shim packs using the figures
determined in A, B, & C, and adjusting the pack as described below.
RING GEAR SIDE:
Assemble shim pack to measurement B.
OPPOSITE SIDE OF RING GEAR:
Assemble shim pack to measurement C. Add .010 (.25 mm) for differential bearing preload and backlash.
EXAMPLE
(1)
Total amount of space measured without ring gear as
shown in step 41, figure 3-40
Measurement A .105" (2-67 mm)
(2)
Total amount of space measured with gear set assembled
in carrier as shown in step 44, figure 3-43
Measurement B .065" (1.65 mm)
(3)
Measurement A minus Measurement B equals calculated Measurement C .040" (1.02 mm)
After the measurements and calculations have been made, assemble the shim packs using the figures
determined in A, B, & C, and adjusting the pack as described below.
RING GEAR SIDE:
Assemble shim pack to measurement B, In this example it is .065" (1.65 mm).
OPPOSITE SIDE OF RING GEAR
Assemble shim pack to measurement C. Add .010 (.25 mm) for differential bearing preload and backlash.
.040" + .010" = .050", (1.02 mm + 25 mm = 1.27mm).