MANUAL TRANSMISSION
Page
Idsntlílcation.......................................62
ModalT-lâß3-Spaod................................6-3
ModeIT-ISAB-Spaad...............................6-11
ModaIT-18A3-Spsad...............................6-18
Paga
Sarvicalllagnosis........._.........................6-1
Specifications.....................................626
TransmisslunInstallation..............................63
Transmisslonßamoval...._...........................62
GENERAL
Three transmission models are used, they are:
T-150, T-15A, and T-18A. Models T-l50 and T-15A are
3-speed, constant mesh units which provide
synchromesh engagement in all three forward gears.
Model T-18A is a 4-speed, constant mesh unit which
provides synchromesh engagement in Second, Third,
and Fourth speeds only-First gear is not
synchronized.
Service Diagnosis
Condition Possible Cause Correction
LOCKS IN TWO ( 1) Worn poppet components. (1) Replace.
GEARS
HARD SHIFTING (l) Improper Clutch linkage ( 1) Adjust.
adjustment.
(2) Synchro-Clutch Wear or failure. (2) Replace.
(3) Incorrect lubricant. (3) Replace.
JUMPS OUT OF (l) Synchro-Clutch wear or failure. (1) Replace.
GEAR (2) Incorrect lubricant. (2) Replace.
NOISE IN LOW GEAR (1) Gear teeth Worn or broken. (l) Replace gears.
LUBRICANT LEAKS (l)
INTO CLUTCH
HOUSING
(3) Gear teeth Worn or tapered. (3) Replace.
(4) Insufficient ínter-lock spring (4) Replace parts.
tension.
(5) Misaligned or loose clutch
housing or clutch housing to
transmission adapter.
(6) Excessive transmission end play. (6) Adjust.
(7) Worn or loose engine mounts. (7) Tighten or replace.
(8) Damaged clutch shaft roller (8) Replace.
bearings.
(9) Damaged or worn crankshaft (9) Replace.
pilot bushing.
(2) Shifting fork bent.
(3) Lack of lubrication.
Gasket leaking at front bearing
cap or cap oil seal leaking. Oil
slinger broken or missing.
(5) Align and tighten.
(2) Replace fork.
(3) Add lubricant as required.
Inspect oil seal, gasket, and oil
slinger. Replace as required.
6-2 MANUAL TBANSMISSIUN
Model T-150 is used in CJ models with six-cylinder
or V-8 engines. Model is used in Cherokee, and
Truck models with six-cylinder or V-8 engines. Model
is used in all models and with six-cylinder or
V-8 engines.
IDENTIFICATION
An identification tag which displays the vendor and
Jeep part number is attached to the transmission shift
control housing. The information on this tag is neces-
sary to obtain the correct components should replace-
ment be necessary.
NOTE: During transmission assembly, be sure to
attach the identification tag to the transmission in the
original location.
TMNSMISSIUN REMOVAL-ALL MODELS
(1) Remove shift lever knob, trim ring, and boot.
(2) Remove floor covering and transmission access
cover from floorpan.
(3) On Cherokee and Truck models with T-15A
3-speed transmission, remove shift control lever hous-
ing assembly (fig. 6-1).
(4) On all models with T-18A 4-speed or CJ models
with T-150 3-speed, remove shift control housing cap,
spring retainer, spring, shift lever, and pin (fig. 6-2).
(5) On models with T-18A 4-speed, remove
transfer case shift lever.
(6) Raise vehicle.
(7) Index mark propeller shafts before removal for
proper alignment at installation.
(8) Remove front propeller shaft and disconnect
rear propeller shaft from transfer case.
(9) Disconnect speedometer cable, backup lamp
switch wires, transmission controlled spark (TCS)
advance (if equipped) and parking brake cable (if con-
nected to crossmember).
nuts securing exhaust pipes to manifolds and lower
catalytic converter (if equipped) and exhaust pipes.
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