Manual Transmission Service Diagnosis - Jeep 1979 CJ-5 Technical & Service Manual

2B-2 MANUAL TRANSMISSION
Service Diagnosis
Condition
Possible Cause
Correction
LOCKS IN TWO
GEARS
(1)
Worn shift mechanism
components.
( i )
Replace shift control housing
components.
HARD SHIFTING
(1)
Improper clutch adjustment.
( i )
Adjust clutch pedal free play.
(2) Synchronizer wear or damage.
(2)
Replace synchronizer(s).
(3) Incorrect lubricant.
(3)
Replace lubricant.
JUMPS OUT OF
(1)
Synchronizer wear or damage.
(1)
Replace synchronizer(s).
GEAR
(2)
Incorrect lubricant.
(2)
Replace lubricant.
(3)
Gear teeth worn or tapered.
(3)
Replace gears as necessary.
(4)
Insufficient shift mechanism
interlock spring tension.
(4)
Replace shift components.
(5)
Misaligned or loose clutch
housing or clutch housing to
transmission adapter.
(5)
Align and/or tighten.
(6)
Excessive transmission end play.
(6)
Replace snap rings and thrust washer
(7)
Worn or loose engine mounts.
(7)
Tighten or replace mounts.
(8)
Damaged clutch shaft roller
bearings.
(8)
Replace bearings.
(9)
Damaged or worn crankshaft
pilot bushing.
(9)
Replace bushing.
NOISE IN LOW GEAR
(1)
Gear teeth worn or broken.
(1)
Replace gears.
(2) Shift fork bent.
(2)
Replace fork.
(3). Lack.of lubrication.
(3)
Add lubricant as required.
LUBRICANT LEAKS
INTO CLUTCH
HOUSING
(1)
Gasket leaking at front bearing
cap or cap oil seal leaking. Oil
slinger broken or missing.
(1)
Inspect oil seal, gasket, and oil
slinger. Replace as required.
LUBRICANT LEAKS
INTO TRANSFER
CASE CAUSING
UNDERFILL IN
TRANSMISSION
AND OVERFILL
IN TRANSFER CASE
(1)
Mainshaft drive gear seal
leaking.
(1)
Replace seal.
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