TROUBLESHOOTING GEAR DISENGAGEMENT (JUMPING OUT OF GEAR) Probable Cause
Remedy
a. Excessive weight and/or length of gear shift lever and/or knob
a. Replace with standard lever and/or knob.
b. Shift lever interference
b. Remove interference.
c. Improperly adjusted remote control linkage
c. Adjust properly.
d. Worn or loose mounting insulators
d. Replace insulators.
e. Loose, broken or missing capscrews between clutch housing and flywheel housing
e. Replace capscrews, check threads in case.
f.
Weak or broken shifter rail poppet springs
f.
Replace springs.
g. Bent or worn shifter forks
g. Replace forks.
h. Broken snap rings
h. Replace snap rings.
i.
Shift rail bent or poppet notches worn
i.
Replace shift rail.
j.
Worn taper or chipped teeth on sliding clutch teeth
j.
Replace sliding clutch and mating gear if its clutch teeth are damaged.
k. Worn or damaged spigot bearing
k. Replace bearing.
l.
l.
Engine flywheel housing misalignment
m. Chassis resonant ride
Realign properly.
m. Correct resonance. OIL LEAKS
Probable Cause
Remedy
a. Oil level too high
a. Drain to correct level.
b. Drain plug, fill plug or magnetic filter plug loose
b. Tighten plugs.
c. Loose or missing capscrews
c. Tighten or replace.
d. Improper lubricant used
d. Drain and refill with correct oil.
e. Clogged air breather
e. Clean or replace.
f.
f.
Gaskets or O-rings broken, shifted or squeezed out of position
Replace gaskets or O-rings.
g. Worn oil seals
g. Replace seals.
h. O-rings in air shift cylinder or cover leaking air pressure into transmission
h. Replace O-rings.
BEARING FAILURE Probable Cause
Remedy
a. Dirt in system
a. Clean system, replace bearings as needed, flush and refill with clean lubricant.
b. Wrong grade of oil, or contaminated oil
b. Clean system, replace bearings as needed, flush and refill with clean lubricant.
c. Excessive vibrations
c. Eliminate vibrations, replace bearings.
d. Binding or seized propeller shaft slip yoke
d. Clean and replace as needed.
e. Improper bearing clamping
e. Replace bearings and re-clamp using correct procedures.
f.
f.
Improper bearing installation (preloads, etc.)
Replace using correct procedures.
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