Jeep 1996 Grand Cherokee Service Manual - page 1168
CONDITION
POSSIBLE CAUSES
CORRECTION
10. Neutral Switch Leaks/Damaged.
10. Replace switch and gasket.
11. Converter Housing Area Leaks.
11. Check for leaks at seal caused by
worn seal or burr on converter hub
(cutting seal), worn bushing, missing oil
return, oil in front pump housing or hole
plugged. Check for leaks past O-ring
seal on pump or past pump-to-case
bolts; pump housing porous, oil coming
out vent due to overfill or leak past front
band shaft access plug.
12. Pump Seal Leaks/Worn/Damaged.
12. Replace seal.
13. Torque Converter Weld Leak/
Cracked Hub.
13. Replace converter.
14. Case Porosity Leaks.
14. Replace case.
NOISY OPERATION IN
FOURTH GEAR ONLY
1. Overdrive Clutch Discs, Plates or
Snap Rings Damaged.
1. Remove unit and rebuild clutch pack.
2. Overdrive Piston or Planetary Thrust
Bearing Damaged.
2. Remove and disassemble unit.
Replace either thrust bearing if
damaged.
3. Output Shaft Bearings Scored/
Damaged.
3. Remove and disassemble unit.
Replace either bearing if damaged.
4. Planetary Gears Worn/Chipped.
4. Remove and overhaul overdrive unit.
5. Overdrive Unit Overrunning Clutch
Rollers Worn/Scored.
5. Remove and overhaul overdrive unit.
SERVICE PROCEDURES
FLUID LEVEL CHECK
Transmission fluid level should be checked monthly
under normal operation. If the vehicle is used for
trailer towing or similar heavy load hauling, check
fluid level and condition weekly. Fluid level is
checked with the engine running at curb idle speed,
the transmission in NEUTRAL and the transmission
fluid at normal operating temperature.
FLUID LEVEL CHECK PROCEDURE
(1) Transmission fluid must be at normal operat-
ing temperature for accurate fluid level check. Drive
vehicle if necessary to bring fluid temperature up to
normal hot operating temperature of 82°C (180°F).
(2) Position vehicle on level surface.
(3) Start and run engine at curb idle speed.
(4) Apply parking brakes.
(5) Shift transmission momentarily into all gear
ranges. Then shift transmission back to Neutral.
(6) Clean top of filler tube and dipstick to keep
dirt from entering tube.
(7) Remove dipstick (Fig. 24) and check fluid level
as follows:
(a) Correct maximum level is to MAX arrow
mark. Correct acceptable level is to OK mark in
crosshatch area.
(b) Incorrect level is at or below MIN line.
(c) If fluid is low, add only enough Mopar ATF
Plus to restore correct level. Do not overfill.
CAUTION:
Do not overfill the transmission. Over-
filling may cause leakage out the pump vent which
can be mistaken for a pump seal leak. Overfilling
will also cause fluid aeration and foaming as the
excess fluid is picked up and churned by the gear
train. This will significantly reduce fluid life.
Fig. 24 Dipstick Fluid Level Marks—Typical
ZJ
TRANSMISSION AND TRANSFER CASE
21 - 29
DIAGNOSIS AND TESTING (Continued)