Jeep J-10 Series 1982 Technical & Service Manual page 716

2D-40 TRANSFER CASE
Service Diagnosis — Model 300 Transfer Case
Condition Possible Cause
Correction
1
TRANSFER CASE
DIFFICULT TO SHIFT
OR WILL NOT SHIFT
INTO DESIRED
RANGE
(1) Vehicle speed too great to permit
shifting.
(2) If vehicle was operated for extended
period in 4H mode on dry paved
surface, driveline torque load may
cause difficult shifting.
(1) Stop vehicle and shift into desired
range. Or reduce speed to 2-3 mph
(3-4 km/h) before attempting to
shift.
(2) Stop vehicle, shift transmission to
neutral, shift transfer case to 2H
mode and operate vehicle in 2H on
dry paved surfaces.
(3) Transfer case external shift linkage
binding.
(3) Lubricate or repair or replace link
age, or tighten loose components as
necessary.
(4) Insufficient or incorrect lubricant.
(4) Drain and refill to edge of fill hole
with SAE 85W-90 gear lubricant
only.
(5) Internal components binding,
worn, or damaged.
(5) Disassemble unit and replace wom or
damaged components as necessary.
TRANSFER CASE
NOISY IN ALL DRIVE
MODES
(1) Insufficient or incorrect lubricant. (1) Drain and refill to edge of fill hole
with SAW 85W-90 gear lubricant
only. Check for leaks and repair if
necessary.
Note: If unit is still noisy after drain i
and refill, disassembly and inspection
may be required to locate source of
noise.
NOISY IN — OR JUMPS
OUT OF FOUR WHEEL
DRIVE LOW RANGE
(1) Transfer case not completely
engaged in 4L position.
(1) Stop vehicle, shift transfer case in
Neutral, then shift back into 4L
position.
(2) Shift linkage loose or binding.
(2) Tighten, lubricate, or repair linkage
as necessary.
(3) Shift fork cracked, inserts worn,
or fork is binding on shift rail.
(3) Disassemble unit and repair as
necessary.
9C770A
LUBRICANT LEAKING
FROM OUTPUT SHAFT
SEALS OR FROM
VENT
(1) Transfer case overfilled.
(2) Vent closed or restricted.
(3) Output shaft seals damaged or
installed incorrectly.
(1) Drain to correct level.
(2) Clear or replace vent if necessary.
(3) Replace seals. Be sure seal lip faces
interior of case when installed. Also
be sure yoke seal surfaces are no:
scored or nicked. Remove scores,
nicks with fine sandpaper or replace
yoke(s) if necessary.
ABNORMAL TIRE
WEAR
(1) Extended operation on dry hard
surface (paved) roads in 4H range.
(1) Operate in 2H on hard surface
(paved) roads.
90770B