Rear Axle Yoke - Drive Line Vibration
83amcjeep01APRIL 1983 000 031
1983 JEEP MODELS WITH AMC/JEEP REAR AXLE
8E
REAR AXLE YOKE Attention: Workshop, Parts Department
Information
The rear axle yoke on some 1983 CJ, Scrambler, Cherokee, Wagoneer and J-10 Truck models may have excess material on the clamp strap mounting surfaces. The presence of this material could interfere with proper seating of the clamp straps. Improper clamp strap seating may result in a driveline vibration.
Vehicles potentially affected are: CJ models built between sequence numbers 18105 and 20493 and Wagoneer, Cherokee and Truck models built between sequence numbers 11861 and 14903. Any vehicles in this group brought in for dealer service due to driveline noise or vibration should be inspected and repaired according to the following procedure.
Filing Instructions
File this I.S. Note at the back of the plastic binder supplied with Supplement No. 1 to the 1982 Jeep Technical Service Manual.
PROCEDURE
Yoke Inspection
1. Inspect the rear axle yoke as follows:
a. If the yoke does not have a green paint mark in the saddle area, or it has a white paint mark in the same area, the yoke must be replaced. Proceed to the Yoke Removal/Installation procedures.
b. If the word "Spicer" is cast into the yoke saddle or the yoke has a green paint mark in the saddle area, the yoke does not require replacement. However, if some type of vibration or noise condition occurred, further diagnosis is needed. Refer to the vibration diagnosis procedures in Chapter 2E of the 1982 Jeep Technical Service Manual.
Yoke Removal
1. Remove both rear wheels and brake drums.
2. Disconnect the propeller shaft from the axle yoke.
3. Inspect the rear universal joint bearing caps for damage. Replace the universal joint if the caps or needle bearings are damaged.
4. Measure and record the amount of torque required to rotate the pinion gear using a socket and inch-pound torque wrench.
NOTE: To be sure of an accurate torque reading, rotate the pinion several revolutions before taking measurement.
5. Remove the pinion nut using Remover Tool J-8614-01 and Nut Socket Tool J-22575.
NOTE: Do not discard the old pinion nut at this time.
6. Position a drain pan under the axle housing.
7. If the yoke has a white paint mark in the saddle area, make a corresponding mark on the pinion shaft for assembly alignment of the new yoke. However, if the yoke does not have a white paint mark, continue with yoke removal.
8. Remove the axle yoke. If the yoke cannot be removed by hand, use tools J-8614-01, -02, and -03.
9. Inspect the pinion seal. Remove the seal if damaged, worn, or leaking using Tool J-9233 or J-7583.
NOTE: If the old seal is removed, do not install a new seal at this time.
Yoke Installation
1. Before installing the new yoke, note the following.
a. If the old yoke has a white paint mark on it, and a corresponding alignment mark was made on the pinion shaft during yoke removal, proceed to Step 2.
b. If the old yoke did not have a white paint mark on it, proceed to Step 3.
2. Replace the yoke seal if necessary. Then align the green paint mark on the new yoke with the alignment reference mark on the pinion shaft and install the yoke. Proceed to Step 5 after the yoke is installed.
NOTE: Replacement yokes are marked in the saddle area with green paint.
3. Install and index the new yoke to the propeller shaft as follows:
a. Position the new yoke on the pinion shaft and install the old pinion nut. Tighten the nut finger tight only.
CAUTION: Tighten the pinion nut by hand only enough to remove yoke end play.
b. Reconnect the shaft to the new yoke and measure runout at the rear of the shaft with Dial Indicator J-8001 or equivalent. Runout at the rear of the shaft must not exceed 0.015-inch.
c. If runout exceeds specifications, disconnect the shaft, turn it 180~, reconnect the shaft and check runout again. If runout is now within specifications, proceed to Step 4. But, if runout still exceeds specifications, proceed to Step d.
d. Disconnect the shaft and remove the yoke. Rotate the yoke 45~ and reinstall it as outlined in Step 1. Then reconnect the shaft and check runout again.
e. If runout is now within specifications, proceed to Step 4. But, if runout is still not within specifications, continue reindexing the yoke in 45~ increments until runout is correct. Then proceed to Step f.
f. Mark the propeller shaft, axle yoke and pinion for assembly alignment reference. Then disconnect the shaft and remove and discard the old pinion nut. Do not remove the yoke unless the pinion seal is to be replaced. Proceed to Step 4.
4. If the pinion seal was removed, install a new pinion seal using tool J-22661 and slide the yoke onto the pinion. Be sure to align the yoke and pinion using the reference marks made in Step 3.
5. Install a new pinion nut using tools J-8614-01 and J-22575.
CAUTION: Tighten the pinion nut only enough to remove yoke end play. Do not overtighten the nut and never use an impact wrench to tighten the nut.
6. Measure pinion gear rotating torque using a socket and inch-pound torque wrench. Rotate the pinion several times to be sure of an accurate reading.
7. Refer to the pinion gear rotating torque recorded in Step 4 of Yoke Removal. Then tighten the new pinion nut to that torque plus an additional 5 inch-pounds for the correct amount of pinion bearing preload.
CAUTION: Tighten the pinion nut in very small increments only to obtain desired torque. Do not overtighten or loosen and retighten the nut. If the desired torque is exceeded, or if the nut is alternately tightened and loosened, the pinion nut and collapsible spacer will have to be replaced and pinion bearing preload reset.
8. Connect the propeller shaft to the yoke. Be sure to align the shaft and yoke using the alignment reference marks made in Step 3.
9. Install the brake drums and wheels.
10. Check and adjust axle lubricant level if necessary with AMC/Jeep/Renault gear lubricant, P/N 89 82 200 046, or an equivalent SAE 75W-90 API GL-5 quality gear lubricant.
PARTS
Description Quantity Part Number
YOKE, Axle 1 8132702
SEAL, Pinion 1 (AR) 3208474
NUT, Pinion 1 3182601
S.R.T. INFORMATION
Operation
Operation Description T.I.C. Number S.R.T.
CO. YOKE, PINION - REPLACE 2-294 2752 1.0
Includes replace pinion seal if necessary.
SO. JOINT REAR UNIVERSAL - REPLACE 2-294 2277 0.3
SO. YOKE, PINION - CHECK RUNOUT 2-294 2999 0.4
AND REINDEX