TM 5-3810-300-24 & P2
TRANSMISSION TROUBLESHOOTING
TROUBLE
PROBABLE CAUSE
REMEDY
Noisy transmission
Gears worn and pitted due to
Replace gears.
(in gear)
lugging engine with transmis-
sion in too high a gear range.
Bearings worn due to lugging
Replace worn or rough
engine with transmission in too
high a gear range, or to chips
and dirt in oil.
Worn, chipped or tapered sliding
Replace gears.
gear teeth.
Noisy speedometer gears
Replace gears.
Transmission not lined up prop-
Line up transmission
erly with chassis
with rear axle so as
to correct angles of
universal joints.
Difficult shifting
Improperly operating clutch
Adjust clutch. Check
alignment.
Sliding gear tight on shaft
Check for galling. Re-
splines
place as necessary.
Burred mainshaft splines
Replace mainshaft.
Improper adjustment of shift-
Check and adjust link-
ing linkage
age and rods to make
sure transmission is
shifting full into
gear.
Worn or bent shifter rails
Replace worn or bent
shifter rails.
Insufficient lubricant
Fill to proper level.
Range shift inoperative or
Air line crossed between control
Disconnect crossed
malfunctioning. valve on shift lever
valve on transmission (steady
air lines and correct
and air
leakage from exhaust port on
hook-up.
range shift control valve, with
button in the UP position).
Lines crossed between air valve
on transmission and the shift
Disconnect crossed
cylinder. Low range (DOWN po-
air lines and correct
sition) of button results in
hook-up.
high range gear engagement, and
vice versa.
Range shift control valve leak-
ing due to poor o-ring seals
Disassemble control
ring seals.
valve and replace o-
Leakage from exhaust port of
regulator due to ruptured dia-
Disassemble, clean and
phragm or clogged regulator
repair regulator.
piston.
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