1988 JEEP CHEROKEE Service Repair Manual

AXLE ASSEMBLY SPECIFICATIONS TABLE








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Application Specification
Axle Shaft End Play ........................ .004-.008" (.10-.20 mm)\
Differential Bearing Preload ........................ .008" (.20 mm)\
Differential Case Face Runout ....................... .002" (.05 mm)\
Differential Side Gear Case Clearance ........... 0-.007" (0-.18 mm)\
Oil Capacity
Standard Drive Axle .............................. 2.5 pts. (1.2L)\
Heavy Duty Drive Axle ............................. 4.7 pts (2.2L)\
Pinion Bearing Preload ................... 15-25 INCH lbs. (2.3 N.m)\
Pinion Gear Depth (Standard)
Standard Drive Axle ............................ 2.095" (53.21 mm)\
Heavy Duty Drive Axle ........................... 2.547" (64.7 mm)\
Ring Gear
Backlash ................................. .005-.009" (.13-.23 mm)\
Preferred ......................................... .008" (.20 mm)\









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TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
Axle Housing Cover ......................................... 14 (19)\
Axle-to-Leaf Spring "U" Bolts .............................. 52 (70)\
Brake Support Plate Bolts .................................. 32 (43)\
Differential Bearing Bolts
Standard Drive Axle ...................................... 57 (77)\
Heavy Duty Drive Axle ................................... 85 (115)\
Rear Axle Filler Plug
Standard Drive Axle ...................................... 25 (34)\
Heavy Duty Drive Axle .................................... 15 (20)\
Rear Spring Front Bolt ................................... 111 (150)\
Rear Spring Rear Shackle Nuts ............................ 111 (150)\
Ring Gear Bolts
Standard Drive Axle ............................... 70-90 (95-122)\
Heavy Duty Drive Axle .................................. 105 (142)\
Shock Absorber-to-Axle Nut ................................. 44 (60)\
Universal Joint Clamp Strap Bolts .......................... 14 (19)\
Wheel Lug Nuts ............................................ 75 (102)\









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PINION DEPTH SHIM ADJUSTMENT SPECIFICATIONS
PINION DEPTH SHIM ADJUSTMENT CHART (INCHES)








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Old Pinion Marking Specification
+4
New Pinion Marking
-4 ....................................... +0.008
-3 ....................................... +0.007
-2 ....................................... +0.006
-1 ....................................... +0.005
0 ........................................ +0.004
+1 ....................................... +0.003
+2 ....................................... +0.002
+3 ....................................... +0.001
+4 ............................................ 0

+3
New Pinion Marking
-4 ....................................... +0.007
-3 ....................................... +0.006
-2 ....................................... +0.005
-1 ....................................... +0.004
0 ........................................ +0.003
+1 ....................................... +0.002
+2 ....................................... +0.001
+3 ............................................ 0
+4 .........................................-0.001
+2
New Pinion Marking
-4 ...................................... +0.006
-3 ....................................... +0.005
-2 ....................................... +0.004
-1 ....................................... +0.003
0 ........................................ +0.002
+1 ....................................... +0.001
+2 ............................................ 0
+3 .........................................-0.001
+4 .........................................-0.002
+1
New Pinion Marking
-4 ....................................... +0.005
-3 ....................................... +0.004
-2 ....................................... +0.003
-1 ....................................... +0.002
0 ........................................ +0.001
+1 ............................................ 0
+2 ....................................... -0.001
+3 ....................................... -0.002
+4 ....................................... -0.003
0
New Pinion Marking
-4 ....................................... +0.004
-3 ....................................... +0.003
-2 ....................................... +0.002
-1 ....................................... +0.001
0 ............................................. 0
+1 ....................................... -0.001
+2 ....................................... -0.002
+3 ....................................... -0.003
+4 .........................................-0.004
-1
New Pinion Marking
-4 ....................................... +0.003
-3 ....................................... +0.002
-2 ....................................... +0.001
-1 ............................................ 0
0 ........................................ -0.001
+1 ....................................... -0.002
+2 ....................................... -0.003
+3 .........................................-0.004
+4 .........................................-0.005
-2
New Pinion Marking
-4 ....................................... +0.002
-3 ....................................... +0.001
-2 ............................................ 0
-1 ....................................... -0.001
0 ........................................ +0.001
+1 ....................................... +0.002

+2 ....................................... +0.003
+3 ....................................... +0.003
+4 ....................................... +0.004
-3
New Pinion Marking
-4 ....................................... +0.001
-3 ....................................... +0.002
-2 ....................................... +0.001
-1 ............................................ 0
0 ........................................ -0.001
+1 ....................................... -0.002
+2 ....................................... -0.003
+3 ....................................... -0.004
+4 .........................................-0.005
-4
New Pinion Marking
-4 ............................................ 0
-3 ....................................... -0.001
-2 ....................................... -0.002
-1 ....................................... -0.003
0 ........................................ -0.004
+1 ....................................... -0.005
+2 ....................................... -0.006
+3 .........................................-0.007
+4 .........................................-0.008









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PINION DEPTH SHIM ADJUSTMENT CHART (MILLIMETERS)








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Old Pinion Marking Specifications
+10
New Pinion Marking
-10 ....................................... +0.20
-8 ........................................ +0.18
-5 ........................................ +0.15
-3 ........................................ +0.13
0 ......................................... +0.10
+3 ........................................ +0.08
+5 ........................................ +0.05
+8 ........................................ +0.03
+10 ........................................... 0
+8
New Pinion Marking
-10 ....................................... +0.18
-8 ........................................ +0.15
-5 ........................................ +0.13
-3 ........................................ +0.10
0 ......................................... +0.08
+3 ........................................ +0.05
+5 ........................................ +0.03
+8 ............................................ 0
+10 ....................................... -0.03
+5
New Pinion Marking
-10 ....................................... +0.15
-8 ........................................ +0.13
-5 ........................................ +0.10
-3 ........................................ +0.08
0 ......................................... +0.05
+3 ........................................ +0.03
+5 ............................................ 0
+8 ........................................ -0.03

+10 .........................................-0.05
+3
New Pinion Marking
-10 ....................................... +0.13
-8 ........................................ +0.10
-5 ........................................ +0.08
-3 ........................................ +0.05
0 ......................................... +0.03
+3 ............................................ 0
+5 ........................................ -0.03
+8 ........................................ -0.05
+10 ....................................... -0.08
0
New Pinion Marking
-10 ....................................... +0.10
-8 ........................................ +0.08
-5 ........................................ +0.05
-3 ........................................ +0.03
0 .......................................... . 0
+3 ..........................................-0.03
+5 ........................................ -0.05
+8 ........................................ -0.08
+10 ....................................... -0.10
-3
New Pinion Marking
-10 ....................................... +0.08
-8 ........................................ +0.05
-5 ........................................ +0.03
-3 ......................................... . 0
0 ......................................... -0.03
+3 ..........................................-0.05
+5 ........................................ -0.08
+8 ........................................ -0.10
+10 ....................................... -0.13
-5
New Pinion Marking
-10 ....................................... +0.05
-8 ........................................ +0.03
-5 ......................................... . 0
-3 ........................................ -0.03
0 ......................................... -0.05
+3 ..........................................-0.08
+5 ........................................ -0.10
+8 ........................................ -0.13
+10 ....................................... -0.15
-8
New Pinion Marking
-10 ....................................... +0.03
-8 ............................................ 0
-5 ........................................ -0.03
-3 ........................................ -0.05
0 ......................................... -0.08
+3 ..........................................-0.10
+5 ........................................ -0.13
+8 ........................................ -0.15
+10 ....................................... -0.18
-10
New Pinion Marking
-10 ........................................... 0
-8 ........................................ -0.03
-5 ........................................ -0.05
-3 ........................................ -0.08
0 ......................................... -0.10

+3 ..........................................-0.13
+5 ........................................ -0.15
+8 ........................................ -0.18
+10 ....................................... -0.20









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DRIV E B ELT R O UTIN G

1988 J e ep C hero ke e
1983-88 ENGINE COOLING
Jeep Drive Belt Routing
Cherokee, Comanche, Wagoneer, Wrangler, Grand Wagoneer
DESCRIPTION
Two drive belt systems are used on Jeep vehicles. The
conventional V-Belt and the single Serpentine or V-Ribbed belt.
The single (Serpentine or V-Ribbed) drive belt system
has been adopted by several manufacturers as a replacement for
multiple V-Belt systems previously offered. The Serpentine belt
requires a suitable belt tensioner similar to those used to control
timing belt tension.
Use of a tensioner allows engine accessories to be mounted
rigidly on the engine. The single belt drive system has a predicted
life of 100,000 miles before replacement is required.
The belt tensioner has a wide functional range and is
capable of maintaining tension during the expected life of the belt.
Tensioner cannot compensate for extreme belt lengths. Poor tension
control and possible tensioner damage can result from excessive belt
length.
INSPECTION
Inspect belt for fraying. If fraying has occurred, ensure
belt and tensioner are aligned properly. See Fig. 1. If tensioner has
reached its limit of travel, belt is excessively stretched and
replacement of belt is required. If excessive noise is noticed from
tensioner or idler, check for possible bearing failure. Small cracks
in the back of the belt are acceptable. Do not apply "Belt Dressing"
or any other additive to serpentine belt.
Fig. 1: Serpentine Belt Alignment
Courtesy of Ford Motor Co.
DRIVE BELT ROUTING

CHEROKEE
Install belt on crankshaft and belt-driven components as
shown. Adjust tensioner. See Figs. 2 and 3.
1983-88
Fig. 2: Drive Belt Arrangement: 1983-88 2.5L Cherokee
Courtesy of Chrysler Motors
1983-86

Fig. 3: Drive Belt Arrangement: 1983-86 4.2L Cherokee
Courtesy of Chrysler Motors
WRANGLER
Install belt on crankshaft and belt-driven components as
shown. Adjust tensioner. See Figs. 4-10.
1983-88