1988 JEEP CHEROKEE drain bolt

Removal & Installation
1) Mark front propeller shaft and flange for alignment
purposes. Remove front propeller shaft. Remove flange. Discard washer
and nut. Using a screwdriver, carefully remove oil seal. Ensure seal
contact surface is clean.
2) Apply ATF to seal lip and yoke seal surface. Install oil
seal and flange with new washer and nut. Install front propeller shaft
using alignment marks. Check transfer case fluid.
EXTENSION HOUSING OIL SEAL & BUSHING
NOTE: When replacing oil seal, DO NOT remove extension housing.
Removal & Installation
1) Mark rear propeller shaft and flange for installation
purposes. Remove rear propeller shaft. Remove bolts and tap extension
housing in a clockwise direction and remove extension housing. DO NOT
pry on extension housing. Using a screwdriver, remove oil seal from
extension housing.
2) Using bushing driver, replace bushing in extension
housing. Install new extension housing oil seal. Apply silicone
sealant to extension housing mating surface. Install extension
housing. Reverse removal procedure to complete installation.
REMOVAL & INSTALLATION
TRANSFER CASE
Removal & Installation
1) Shift transfer case into Neutral position and drain fluid.
Mark front and rear drive shaft for installation purposes. Remove
front and rear drive shafts. Disconnect vacuum lines and speedometer
cable. Remove rear crossmember.
2) Disconnect shift linkage. Support transfer case with a
jack. Separate transfer case from transmission. Remove transfer case.
To install, reverse removal procedure. Tighten bolts to specification.
See TORQUE SPECIFICATIONS . Adjust shift linkage, if necessary.
TRANSFER CASE DISASSEMBLY
1) Remove drain and fill plugs. See Fig. 1. Remove front
companion flange, washer and seal. Place transfer case in 4L position.
Remove extension housing. See EXTENSION HOUSING OIL SEAL & BUSHING
under ON-VEHICLE SERVICE. Remove rear bearing snap ring. Remove rear
bearing retainer. Separate rear case from front case using prybars or
screwdriver. DO NOT damage mating surfaces.
NOTE: DO NOT disassemble oil pump, replace as unit only.
2) Remove oil pump, pick-up tube and screen from rear case.
Remove pick-up tube "O" ring from oil pump. Remove magnet from front
case. Remove drive sprocket snap ring. Remove drive sprocket and drive
chain.
3) Remove front output shaft. Remove shift lever from sector
shaft. Remove shift detent plug, spring and plunger. Remove plug from
low range fork lock pin access hole. Move shift sector until lock pin
is aligned with hole. Remove lock pin with No. 1 screw extractor.
4) Remove shift rail from fork assembly. Remove mode fork and
mainshaft as an assembly. Record mode sleeve position. Remove mode
shift sleeve and mode fork assembly. Remove sleeve from fork. Remove

"O" ring in oil pump. Install oil pick-up tube and screen. Ensure
screen is properly positioned. See Fig. 2.
12) Install magnet in front case. Apply 1/8" bead of silicone
sealant to front case mating surface. Assemble case halves together.
Tighten to specification. Ensure mainshaft splines are engaged with
oil pump inner gear and a washer is used on bolts at dowel locations.
13) Install rear retainer bearing in retainer. Apply 1/8"
bead of silicone sealer and install retainer to case. Install rear
bearing snap ring. Install extension housing. Install front companion
flange. Install vacuum switch and drain plug. Fill transfer case with
Dexron II.
Fig. 2: Identifying Oil Pump Screen Position
Courtesy of Chrysler Motors.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
Companion Flange Nut .................... 90-130 (122-176)
Detent Plug ...................................... 14 (19)
Drain & Fill Plug ................................ 27 (37)
Extension Housing Bolt ........................... 26 (35)
Front Bearing Retainer Bolt ...................... 12 (16)
Front Case-to-Rear Case Bolt ............... 26-34 (35-46)
Shift Fork Set Screw ............................. 15 (20)
Transfer Case-to-Transmission .................... 26 (35)









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\003
TR AN SM IS SIO N R EM OVA L & IN STA LLA TIO N - A /T

1988 J e ep C hero ke e
1988 Automatic Transmission Removal
JEEP
TRANSMISSION
ALL MODELS
Removal
1) Disconnect fan shroud and transmission fill tube upper
bracket. Raise vehicle. Remove converter inspection cover and fill
tube. Remove starter.
2) Mark drive shafts for reassembly. Disconnect shafts at
transfer case and wire to frame rails. DO NOT allow shafts to hang
free as damage to universal joints may result. On V8 models,
disconnect exhaust pipes from exhaust manifolds. Drain transfer case
lubricant. Disconnect speedometer cable from transmission.
3) Disconnect all shift and throttle linkages and wiring
from transmission and transfer case. Mark converter drive plate and
converter for reassembly and remove torque converter-to-drive plate
bolts. Rotate crankshaft to gain access to bolts.
4) Support transmission/transfer case assembly with jack and
secure with chain. Remove bolts and rear transmission crossmember.
Lower transmission enough to disconnect cooler lines at transmission.
Remove transmission-to-engine retaining bolts and slowly slide
transmission assembly away from engine.
5) Hold converter in position while lowering transmission
assembly from vehicle. Separate transmission from transfer case.
Installation
To install, reverse removal procedures. DO NOT tighten
exhaust pipe attaching bolts until crossmember has been installed and
transmission jack has been removed. Make sure all index marks made at
removal are aligned. Tighten all bolts to specification and fill
transmission and transfer case with fluid.
TORQUE SPECIFICATIONS
TIGHTENING SPECIFICATIONS








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Application Ft. Lbs. (N.m)\
Cooler Line Nuts ........................................... 25 (34)\
Torque Converter-to-Drive Plate Bolts ...................... 22 (30)\
Transfer Case-to-Transmission Bolts ........................ 40 (54)\
Transmission-to-Engine Bolts ............................... 30 (41)\









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Model 228 ............................................ 7.0 pts. (3.3L)\
Model 229 ............................................ 6.0 pts. (3.8L)\









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DRAINING & REFILLING
Transmission
1) Loosen oil pan bolts, tap pan to break it loose and allow
fluid to drain. Remove pan. Install new filter on bottom of valve
body and tighten retaining screws. Install new "O" ring on fluid
pick-up pipe (if needed). Clean oil pan and install with new gasket.
2) Refill transmission with fluid. Start engine and allow to
run at curb idle for a few minutes. With vehicle on level surface,
engine idling and parking brake applied, move shift selector lever
through all gear ranges, ending in "N" ("P" for AW-4 transmission).
Add fluid up to "ADD ONE PINT" mark on dipstick.
3) Recheck fluid level when transmission reaches normal
operating temperature. Fluid should be between "ADD ONE PINT" and
"FULL" marks on dipstick. Transmission must NOT be overfilled.
Transfer Case
Remove drain plug from transfer case. Remove fill plug for
easier draining. With fluid fully drained, reinstall drain plug. Fill
transfer case to fill plug opening with Dexron II.
ADJUSTMENT
NOTE: Bands on the AW-4 (4-speed overdrive) transmission are not
adjustable. If slippage occurs, bands must be replaced.
KICKDOWN (FRONT) BAND
1) Locate kickdown band adjusting screw on left side of case
(near throttle lever shaft). Loosen adjusting screw lock nut and back
off approximately 5 turns. Ensure adjusting screw turns freely in
case.
2) Using Adapter (J-24063) and 5/16" square socket, tighten
screw to 36 INCH lbs. (4 N.m). If adapter is not used, tighten screw
to 72 INCH lbs. (8 N.m). Back off adjusting screw. See KICKDOWN
(FRONT) BAND ADJUSTMENT table. Hold adjusting screw in position and
tighten lock nut to 35 ft. lbs. (48 N.m).
KICKDOWN (FRONT) BAND ADJUSTMENT









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Application (1) Back Off Screw\
All Models ............................................... 2 1/2 Turns
(1) - Tighten screw to 72 INCH lbs. (8 N.m) and back off indicated
number of turns.









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LOW-REVERSE (REAR) BAND
1) Raise vehicle, drain transmission fluid and remove oil
pan. Locate adjusting screw on rear servo lever. Loosen adjusting
screw lock nut and back off about 5 turns.
2) Tighten screw to 41 INCH lbs. (4.6 N.m) and back off
screw at indicated number of turns. See LOW-REVERSE (REAR) BAND
ADJUSTMENT table. Hold adjusting screw in position and tighten lock
nut to 35 ft. lbs. (48 N.m). Install oil pan and fill transmission