Jeep Cherokee 2000 Service Manual - page 1103
tools are included in Bushing Tool Sets C-3887-B, or
C-3887-J.
Pre-sized
service
bushings
are
available
for
replacement purposes. Only the sun gear bushings
are not serviced. Replace the gear as an assembly if
the bushings are severely scored, or worn.
Heli-Coil inserts are recommended for repairing
damaged, stripped or worn threads in aluminum
parts. Stainless steel inserts are preferred.
The use of crocus cloth is permissible where neces-
sary, providing it is used carefully. When used on
valves, use extreme care to avoid rounding off sharp
edges. Sharp edges are vital as they prevent foreign
matter from getting between the valve and valve
bore.
Do not reuse oil seals, gaskets, seal rings, or
O-rings during overhaul. Replace these parts as a
matter of course. Also do not reuse snap rings or
E-clips that are bent or distorted. Replace these parts
as well.
Lubricate transmission parts with Mopar
t ATF
Plus 3, Type 7176 transmission fluid during assem-
bly. Use Mopar
t Door Ease, or Ru-Glyde to lubricate
piston seals and O-rings. Use petroleum jelly on
thrust washers and to hold parts in place during
reassembly.
OVERRUNNING CLUTCH/LOW-REVERSE
DRUM/OVERDRIVE PISTON RETAINER
Clean the overrunning clutch assembly, clutch cam,
low-reverse drum, and overdrive piston retainer in
solvent. Dry them with compressed air after clean-
ing.
Inspect condition of each clutch part after cleaning.
Replace the overrunning clutch roller and spring
assembly if any rollers or springs are worn or dam-
aged, or if the roller cage is distorted, or damaged.
Replace the cam if worn, cracked or damaged.
Replace the low-reverse drum if the clutch race,
roller surface or inside diameter is scored, worn or
damaged. Do not remove the clutch race from
the low-reverse drum under any circumstances.
Replace the drum and race as an assembly if
either component is damaged.
Examine the overdrive piston retainer carefully for
wear, cracks, scoring or other damage. Be sure the
retainer hub is a snug fit in the case and drum.
Replace the retainer if worn or damaged.
FRONT SERVO
Clean the servo piston components with solvent
and dry them with compressed air. Wipe the band
clean with lint free shop towels.
Replace the front band if distorted, lining is
burned, flaking off, or worn to the point where the
grooves in the lining material are no longer visible.
Inspect the servo components (Fig. 224). Replace
the springs if collapsed, distorted or broken. Replace
the guide, rod and piston if cracked, bent, or worn.
Discard the servo snap ring if distorted or warped.
Check the servo piston bore for wear. If the bore is
severely scored, or damaged, it will be necessary to
replace the case.
Replace any servo component if doubt exists about
condition. Do not reuse suspect parts.
REAR SERVO
Remove and discard the servo piston seal ring (Fig.
225). Then clean the servo components with solvent
and dry with compressed air. Replace either spring if
collapsed, distorted or broken. Replace the plug and
piston if cracked, bent, or worn. Discard the servo
snap rings and use a new ones at assembly.
OIL PUMP AND REACTION SHAFT SUPPORT
(1) Clean pump and support components with sol-
vent and dry them with compressed air.
(2) Check condition of the seal rings and thrust
washer on the reaction shaft support. The seal rings
do not need to be replaced unless cracked, broken, or
severely worn.
(3) Inspect the pump and support components.
Replace the pump or support if the seal ring grooves
or machined surfaces are worn, scored, pitted, or
damaged. Replace the pump gears if pitted, worn
chipped, or damaged.
Fig. 224
1 – PISTON RINGS
2 – O-RING
3 – SNAP-RING
4 – SEAL RING
5 – PISTON ROD GUIDE
6 – SNAP-RING
7 – SERVO SPRING
8 – PISTON ROD
9 – SERVO PISTON
XJ
AUTOMATIC TRANSMISSION—30RH
21 - 195
CLEANING AND INSPECTION (Continued)