Pinion Bearing Preload Adjustment; Differential Side Gear Adjustment - Jeep 1979 CJ-5 Technical & Service Manual

2F-36 AXLES
(20) Loosen gauge block thumbscrew and release
plunger. When plunger contacts arbor tool, tighten
thumbscrew to lock plunger in position. Do not disturb
plunger position.
(21)' Remove clamp and bolt from axle housing.
(22) Remove gauge block and measure distance from
end of anvil to end of plunger using 3-inch (7.62 cm)
micometer (fig. 2F-55). This dimension represents
measured pinion depth. Record this dimension for as-
sembly reference.
N O T E : If the measured pinion depth equals the desired
pinion depth, the installed shim thickness is correct and
further adjustment is not required.
(23) Remove bearing caps and remove arbor tool and
discs.
(24) Remove pinion gear, rear bearing cup, and depth
shim from axle housing.
(25) Measure thickness of depth shim just removed
from housing and add this dimension to measured pin-
ion depth obtained in previous step. From this total,
subtract desired pinion depth. Result represents shim
thickness required to adjust pinion depth.
N O T E : The desired pinion depth is the standard set-
ting plus or minus the pinion depth variance.
The following examples illustrate the procedure for de-
termining correct shim thickness.
Example I—Pinion Depth Variance is Plus (+) Model 44
Axle
Step 1—Determine desired pinion depth.
Add pinion depth variance (marked on pinion gear) to
standard setting. Result is desired pinion depth.
Standard Setting ............. 2.625 (66.6 mm)
Pinion Depth Variance +0,004 (0.10 mm)
Desired Pinion Depth = 2.629 (66.7 mm)
Step 2—Determine total measured pinion depth.
Add measured pinion depth to measure shim thickness.
Result is total measured pinion depth.
Measured Pinion Depth 2.601 (66.0 mm)
Starter Shim Thickness +0.107 (2.71 mm)
Total Measured Pinion Depth = 2.708 (68.7 mm)
Step 3—Determine correct shim thickness.
Subtract desired pinion depth from total measured
pinion depth. Result is correct shim thickness.
Total Measured Pinion Depth...... 2.708 (68.7 mm)
Desired Pinion Depth. . . . . . . . . -2.629 (66.7 mm)
Correct Shim Thickness = 0.079 (2.00 mm)
- r — r - a E ^ ; —
=
^ M " ~ ~ Z I W 1
Example II—Pinion Depth Variance is Minus (-) Model
60 Axle
Step 1—Obtain desired pinion depth.
Subtract pinion depth variance (marked on pinion
gear) from standard setting. Result is desired pinion
depth.
Standard Setting................. 3.125 (79.3 mm)
Pinion Depth Variance -0.002 (0.05 mm)
Desired Pinion Depth = 3.123 (79.35 mm)
Step 2—Determine total measured pinion depth.
Add measured pinion depth to measured shim thick-
ness. Result equals total measured pinion depth.
Measured Pinion Depth...... 3.120 (79.2 mm)
Starter Shim Thickness.......... +0.100 (2.54 mm)
Total Measured Pinon Depth = 3.220 (81.7 mm)
Step 3—Determine correct shim thickness.
Subtract desired pinion depth from total measured
pinion depth. Result is correct shim thickness.
Total Measured Pinion Depth 3.220 (81.7 mm)
Desired Pinion Depth -3.123 (79.3 mm)
Correct Shim Thickness = 0.097 (2.46 mm)
(26) Remove pinion gear, rear bearing cup, and
starter shim.
(27) Install correct thickness pinion depth shim in
housing bearingcup bore and reinstall rear bearing cup.
Pinion Bearing Preload Adjustment
(1) Install pinion bearing preload shims on pinion.
(2) Install pinion gear, front bearing, oil slinger, if
equipped, yoke, washer, and old pinion nut. Tighten nut
to 260 foot-pounds (352 N*m) torque.
(3) Measure torque required to rotate pinion using
0-50 inch-pound torque wrench. Rotating torque should
be 20-40 inch-pounds (2-5 N«m) with new bearings, or
10-20 inch-pounds (1-2 N*m) with original bearings. Add
shims to decrease preload or subtract shims to increase
preload.
(4) Remove pinion nut, washer and yoke when pin-
ion bearing preload is adjusted.
(5) Install new pinion oil seal. On Model 30 and 44
axles, install seal using tool J-25104. On Model 60 axles,
install seal using tool J-24384.
(6) Install yoke and pinion washer.
(7) Install new pinion nut. On Model 30 and 44
axles, tighten nut to 210 foot-pounds (285 N*m) torque.
On Model 60 axles, tighten nut to 260 foot-pounds (352
N®m).
Differential Side Gear Adjustment
(1) Install thrust washers on side gears and install
gears in case.
(2) Install thrust washers on differential pinion
gears and install gears in case. ..