Cherokee 4WD L6-4.0L VIN S (1998)
Pinion Gear: Adjustments
8 1/4 Axle
GENERAL INFORMATION
Pinion Gear ID Numbers
Ring and pinion gears are supplied as matched sets only. The identifying numbers for the ring and pinion gear are marked on the face of each gear.
A plus (+) number, minus (-) number or zero (0) is marked on the face of the pinion gear. This number is the amount (in thousandths of an inch)
the depth varies from the standard depth setting of a pinion marked with a (0). The standard depth provides the best teeth contact pattern. Refer to
Backlash and Contact Pattern Analysis for additional information.
Shim Locations
Compensation for pinion depth variance is achieved with select shims. The shims are placed under the rear pinion bearing cone.
If a new gear set is being installed, note the depth variance marked on both the original and replacement pinion gear. Add or subtract the thickness
of the original depth shims to compensate for the difference in the depth variances. Refer to the Depth Variance charts.
Note where Old and New Pinion Marking columns intersect. Intersecting figure represents plus or minus amount needed.
Note the marked number on the face of the drive pinion gear (-1, -2, 0, +1, +2, etc.). The numbers represent thousands of an inch deviation from
the standard: If the number is negative, add that value to the required thickness of the depth shim(s). If the number is positive, subtract that value
from the thickness of the depth shim(s). If the number is 0 no change is necessary.
