Section 138 (Front Axle): Adjustments: Adjustments: Notes
Ring and pinion gears are supplied as matched sets. Gear match numbers (3) for the ring and pinion gear are etched onto each gear. A plus (+) number, minus (-) number or zero (0) is etched into the face of the pinion gear (2). This number is the amount (in thousandths of an inch) the depth varies from the standard depth setting of a pinion etched with a (0).
If installing a new gear, note the depth variance number of the original and replacement pinion. The numbers represent thousands of an inch deviation from the standard. Add or subtract this number from the original depth shim/oil slinger to compensate for the difference in the depth variances. If the number is negative, add that value to the required thickness of the depth shims. If the number is positive, subtract that value from the thickness of the depth shim.
Compensation for pinion depth variance is achieved with a select shim/oil slinger. The shims are placed between the rear pinion bearing and pinion gear head.
Pinion Gear Depth Variance Chart : Note where Old and New Pinion Marking columns intersect. Intersecting figure represents plus or minus the amount needed.
| Original Pinion Gear Depth Variance | Replacement Pinion Gear Depth Variance | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ?4 | ?3 | ?2 | ?1 | 0 | +1 | +2 | +3 | +4 | ||
| +4 | +0.008 | +0.007 | +0.006 | +0.005 | +0.004 | +0.003 | +0.002 | +0.001 | 0 | |
| +3 | +0.007 | +0.006 | +0.005 | +0.004 | +0.003 | +0.002 | +0.001 | 0 | ?0.001 | |
| +2 | +0.006 | +0.005 | +0.004 | +0.003 | +0.002 | +0.001 | 0 | ?0.001 | ?0.002 | |
| +1 | +0.005 | +0.004 | +0.003 | +0.002 | +0.001 | 0 | ?0.001 | ?0.002 | ?0.003 | |
| 0 | +0.004 | +0.003 | +0.002 | +0.001 | 0 | ?0.001 | ?0.002 | ?0.003 | ?0.004 | |
| ?1 | +0.003 | +0.002 | +0.001 | 0 | ?0.001 | ?0.002 | ?0.003 | ?0.004 | ?0.005 | |
| ?2 | +0.002 | +0.001 | 0 | ?0.001 | ?0.002 | ?0.003 | ?0.004 | ?0.005 | ?0.006 | |
| ?3 | +0.001 | 0 | ?0.001 | ?0.002 | ?0.003 | ?0.004 | ?0.005 | ?0.006 | ?0.007 | |
| ?4 | 0 | ?0.001 | ?0.002 | ?0.003 | ?0.004 | ?0.005 | ?0.006 | ?0.007 | ?0.008 | |