Chrysler 300M, Dodge Interpid. Manual — part 319
(52) Apply a 1/8 inch bead of sealant to differential
cover flange. Then install differential cover with seal-
ant (Fig. 231) and tighten cover bolts.
(53) Install seal protector (special tool 6591) on
shaft (Fig. 232).
CAUTION: Lube threads and O-ring on adjuster
before installing. Failure to due so will result in
thread damage to the adjuster and differential
cover.
(54) Install outer adjuster with new O-ring (Fig.
233). Torque the outer adjuster (special tool 6503) to
the torque reading recorded in Step 30. Then seat
bearings by turning differential three or four revolu-
tions in both directions. Tighten adjuster a second
time to same torque recorded in Step 30. Again
reseat bearings. Repeat this sequence until correct
adjuster torque is maintained.
(55) To check and/or adjust backlash, remove the
inspection plug from the top of the differential.
Install dial indicator as shown in (Fig. 234). The tip
of the dial indicator must be perpendicular against
one of the ring gear teeth. Hold transfer shaft with
locking pliers. Move ring gear back and forth with
special tool 6548. Read the amount of backlash with
dial indicator. Backlash should be 0.006
9 to 0.0099
thousands of an inch.
Fig. 231 Differential Cover Installation
1 - SIDE COVER
Fig. 232 Seal Protector
1 - SEAL PROTECTOR (6591)
2 - SIDE COVER
Fig. 233 Outer Adjuster Installation
1 - O-RING
2 - OUTER ADJUSTER
Fig. 234 Dial Indicator Installation
1 - DIAL INDICATOR KIT C-3339
2 - ACCESS HOLE
LH
TRANSAXLE
21 - 95
FINAL DRIVE (Continued)
(56) If there is too much backlash, loosen the outer
adjuster with special tool 6503. Then turn the inner
adjuster so that it moves away from the ring
gear. After adjusting the inner adjuster, retighten
the outer adjuster to the torque recorded in Step 30.
The inner adjuster should be turned in small incre-
ments.
(57) If there is not enough backlash, loosen the
outer adjuster with special tool 6503. Then turn the
inner adjuster so that it moves towards the ring
gear. After adjusting the inner adjuster, retighten
the outer adjuster to the torque recorded in Step 30.
The inner adjuster should be turned in small incre-
ments.
(58) Once
backlash
is
with
in
specifications,
recheck backlash in four spots on the ring gear 90
degrees apart. All four readings should be within
specifications.
(59) Install inner and outer adjuster locking brack-
ets.
(60) Install new inspection plug. Use a wooden
block to tap inspection plug into place.
(61) Fill differential. It is easier to fill the differen-
tial prior to installing the transaxle back into the
vehicle. (Refer to 21 - TRANSMISSION/TRANS-
AXLE/AUTOMATIC - 42LE/FLUID - STANDARD
PROCEDURE)
FLUID
STANDARD PROCEDURE
STANDARD PROCEDURE - FLUID LEVEL AND
CONDITION CHECK
NOTE: The transmission and differential have sepa-
rate oil sumps. The transmission sump requires
automatic transmission fluid. (Refer to LUBRICA-
TION & MAINTENANCE/FLUID TYPES - DESCRIP-
TION) for proper fluid required for this transaxle.
The differential sump requires petroleum based
hypoid gear lube. (Refer to LUBRICATION & MAIN-
TENANCE/FLUID TYPES - DESCRIPTION) for proper
fluid required for this differential.
TRANSMISSION SUMP
FLUID LEVEL CHECK
The transmission sump has a dipstick to check oil
similar to most automatic transmissions. It is located
on the left side of the engine. Be sure to wipe all dirt
from dipstick handle before removing.
The torque converter fills in both the P Park and N
Neutral positions. Place the selector lever in P Park
to be sure that the fluid level check is accurate. The
engine should be running at idle speed for at
least one minute, with the vehicle on level
ground. At normal operating temperature (approxi-
mately 82 C. or 180 F.), the fluid level is correct if it
is in the HOT region (cross-hatched area) on the oil
level indicator (Fig. 235). The fluid level should be in
COLD region at 80° F fluid temperature. Adjust fluid
level as necessary. Use only Mopar
t ATF+4.
FLUID LEVEL CHECK USING DRB
NOTE: Engine and Transaxle should be at normal
operating temperature before performing this proce-
dure.
(1) Start engine and apply parking brake.
(2) Connect DRBIII
t scan tool and select transmis-
sion.
(3) Select sensors.
(4) Read the transmission temperature value.
(5) Compare the fluid temperature value with the
chart.
(6) Adjust transmission fluid level shown on the
dipstick according to the chart (Fig. 236). Use only
Mopar
t ATF+4 Automatic Transmission Fluid (MS
9602).
(7) Check transmission for leaks.
Low fluid level can cause a variety of conditions
because it allows the pump to take in air along with
the fluid. As in any hydraulic system, air bubbles
make the fluid spongy, therefore, pressures will be
low and build up slowly.
Improper filling can also raise the fluid level too
high. When the transaxle has too much fluid, the
gears churn up foam and cause the same conditions
which occur with a low fluid level.
Fig. 235 Fluid Level Indicator
1 - FLUID LEVEL INDICATOR
21 - 96
TRANSAXLE
LH
FINAL DRIVE (Continued)
In either case, air bubbles can cause overheating
and/or fluid oxidation, and varnishing. This can
interfere with normal valve, clutch, and accumulator
operation. Foaming can also result in fluid escaping
from the transaxle vent where it may be mistaken
for a leak.
Along with fluid level, it is important to check the
condition of the fluid. When the fluid smells burned,
and is contaminated with metal or friction material
particles, a complete transaxle recondition is needed.
Be sure to examine the fluid on the dipstick closely.
If there is any doubt about its condition, drain out a
sample for a double check.
Mopar
t ATF+4 when new is red in color. The ATF
is dyed red so it can be identified from other fluids
used in the vehicle such as engine oil or antifreeze.
The red color is not permanent and is not an indica-
tor of fluid condition. As the vehicle is driven, the
ATF will begin to look darker in color and may even-
tually become brown. This is normal. ATF+4 also
has a unique odor that may change with age. Conse-
quently, odor and color cannot be used to indi-
cate the fluid condition or the need for a fluid
change.
After the fluid has been checked, seat the dipstick
fully to seal out water and dirt.
DIFFERENTIAL SUMP
The differential sump is checked separately from
the transmission. A fill plug located on the side of the
transaxle must be removed to check fluid level. The
fluid should be within 9 mm (.375 in.) of the bottom
of the fill hole. The differential capacity is 0.95 liters
(32 ounces). Adjust if needed. Use Mopar
t Fuel Sav-
ing 75w-90 Petroleum Based Hypoid Gear Lubricant.
Inspect the differential area during engine oil
changes for any leaks. If leakage is present, deter-
mine the source of the leak and repair as required.
Remove the fill plug and verify the proper level.
Adjust if needed. Use Mopar
t Fuel Saving 75w-90
Petroleum Based Hypoid Gear Lubricant.
STANDARD PROCEDURE - FLUID/FILTER
SERVICE
NOTE: Refer to the maintenance schedules, or the
vehicle owner’s manual, for the recommended
maintenance (fluid/filter change) intervals for this
transaxle.
Fig. 236 42LE Fluid Temperature Chart
1 - MAX. LEVEL
2 - MIN. LEVEL
LH
TRANSAXLE
21 - 97
FLUID (Continued)
NOTE: The 42LE Transaxle has separate transmis-
sion and differential fluid sumps. Only fluids of the
type labeled Mopar
T
ATF+4 (Automatic Transmis-
sion Fluid) should be used in the transaxle sump. A
filter change should be made at the time of the
transmission oil change. The magnet (on the inside
of the oil pan) should also be cleaned with a clean,
dry cloth.
NOTE: If the transaxle is disassembled for any rea-
son, the fluid and filter should be changed.
FLUID/FILTER SERVICE (RECOMMENDED)
(1) Raise vehicle on a hoist (Refer to LUBRICA-
TION & MAINTENANCE/HOISTING - STANDARD
PROCEDURE). Place a drain container with a large
opening, under transaxle oil pan.
(2) Loosen pan bolts and tap the pan at one corner
to break it loose allowing fluid to drain, then remove
the oil pan.
(3) Install a new filter and o-ring on bottom of the
valve body and tighten retaining screws to 5 N·m (40
in. lbs.).
(4) Clean the oil pan and magnet. Reinstall pan
using new Mopar Silicone Adhesive sealant. Tighten
oil pan bolts to 19 N·m (165 in. lbs.).
(5) Pour four quarts of Mopar
t ATF+4 (Automatic
Transmission Fluid) through the dipstick opening.
(6) Start engine and allow to idle for at least one
minute. Then, with parking and service brakes
applied, move selector lever momentarily to each
position, ending in the park or neutral position.
(7) Check the transaxle fluid level and add an
appropriate amount to bring the transaxle fluid level
to 3mm (1/8 in.) below the lowest mark on the dip-
stick (Fig. 237).
(8) Recheck the fluid level after the transaxle has
reached
normal
operating
temperature
(180°F.).
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - 42LE/FLUID - STANDARD PROCEDURE).
(9) To prevent dirt from entering transaxle, make
certain that dipstick is fully seated into the dipstick
opening.
DIPSTICK TUBE FLUID SUCTION METHOD
(1) When performing the fluid suction method,
make sure the transaxle is at full operating temper-
ature.
(2) To perform the dipstick tube fluid suction
method, use a suitable fluid suction device (Vacula™
or equivalent).
(3) Insert the fluid suction line into the dipstick
tube.
NOTE: Verify that the suction line is inserted to the
lowest point of the transaxle oil pan. This will
ensure complete evacuation of the fluid in the pan.
(4) Follow the manufacturers recommended proce-
dure and evacuate the fluid from the transaxle.
(5) Remove the suction line from the dipstick tube.
(6) Pour four quarts of Mopar
t ATF+4 (Automatic
Transmission Fluid) through the dipstick opening.
(7) Start engine and allow to idle for at least one
minute. Then, with parking and service brakes
applied, move selector lever momentarily to each
position, ending in the park or neutral position.
(8) Check the transaxle fluid level and add an
appropriate amount to bring the transaxle fluid level
to 3mm (1/8 in.) below the lowest mark on the dip-
stick (Fig. 237).
(9) Recheck the fluid level after the transaxle has
reached
normal
operating
temperature
(180°F.).
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - 42LE/FLUID - STANDARD PROCEDURE)
(10) To prevent dirt from entering transaxle, make
certain that dipstick is fully seated into the dipstick
opening.
STANDARD PROCEDURE - DIFFERENTIAL
SUMP DRAIN AND REFILL
DRAIN
(1) Raise vehicle on hoist (Refer to LUBRICATION
& MAINTENANCE/HOISTING - STANDARD PRO-
CEDURE).
(2) Remove differential drain plug located on the
bottom of the differential housing. Allow the fluid to
drain into an oil drain pan.
Fig. 237 Fluid Level Indicator
1 - FLUID LEVEL INDICATOR
21 - 98
TRANSAXLE
LH
FLUID (Continued)
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