TM 5-3810-300-24 & P2
TRANSMISSION TROUBLESHOOTING
TROUBLE
PROBABLE CAUSE
REMEDY
Sticking in gear
Clutch operating improperly
Adjust clutch. Check
alignment.
Sliding gear tight on mainshaft
Check for galling.
splines
Replace as necessary.
Improper adjustment of linkage
Adjust linkage.
Jumping out of gear
Misaligned transmission
Check alignment.
Shift rail poppet springs broken.
Replace poppet springs.
Shift rail poppet notch worn
Replace shift rail.
Shift forks sprung or loose on
sprung fork
shift rail
or tighten setscrew in
shift fork.
Linkage and rods between shift
Check and adjust link-
lever and auxiliary transmis-
age and rods to make
sion not properly adjusted
sure transmission is
shifting full into gear.
Clutch gear teeth worn tapered
Replace worn parts.
Bearings worn
Replace bearings.
Transmission mounting in chas-
sis puts strain oh case.
Line up front mounting
bracket so it does not
cause strain on front
mainshaft bearing re-
tainer.
Oil leakage
Transmission overfilled
Drain to proper level.
Breather stopped up
Clean breather assembly.-
Use of transmission oil that
Drain and refill with
foams and expands when hot.
high grade properly
refined, straight run
mineral oil.
Drain back holes between bear-
Check drain holes and
ing retainers and main case
gaskets to make sure
stopped up
openings are clean.
Broken gaskets
Replace gaskets and
use gasket cement.
Worn mainshaft bearings
Replace bearings.
Loose drain plug in transmis-
Tighten drain plug.
sion.
Cracked transmission housing
Replace transmission.
Cover not properly tightened
Tighten cover.
Bearing failure
Use of wrong type or grade of
Drain transmission;
lubricant
flush and refill with
proper grade and type
of lubricant.
4-103
