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C635 TRANSAXLE
3
SHIFTING INTO GEAR DIFFICULT
1. Shifting gears is sometimes difficult, gear clash heard when shifting.
PRILIMANARY
CHECKS
EVERYTHING OK
PROBLEMS
ENCOUNTERED
RESOLUTION
Check for proper clutch
disengagement:
with
the engine running
depress the clutch
pedal and engage a
gear.
Continue to Step 2
Gear clash when shifting Diagnose clutch
2.
CHECK GEAR
SELECTION
EVERYTHING OK
PROBLEMS
ENCOUNTERED
RESOLUTION
Verify the integrity of the
springs and the bearing
for the gearbox.
Continue to Step 3
Damaged springs or
bearings
Replace
damaged
components.
3.
CHECK
SYNCHRONIZER
RINGS
EVERYTHING OK
PROBLEMS
ENCOUNTERED
RESOLUTION
Inspect
the
synchronizers. Check
the synchronizer rings:
must not show signs of
wear on the inner
surfaces and not show
signs of wear or
discoloration from heat.
Continue to Step 4
Worn rings
Replace synchronizers.
4.
CHECK GEARS
EVERYTHING OK
PROBLEMS
ENCOUNTERED
RESOLUTION
Inspect the gears.
Check the front teeth of
the gears: must not
have nicks or excessive
wear.
Continue to Step 5
Worn gears
Replace
the
gear
concerned.
5.
CHECK
SYNCHRONIZER
HUBS AND SLIDING
SLEEVES
EVERYTHING OK
PROBLEMS
ENCOUNTERED
RESOLUTION
Inspect the sliding
sleeves and hubs.
Check the hubs and
sliding sleeves: - Must
have no nicks, wear or
excessive play – Must
move freely.
End diagnosis
Worn sleeves or hubs
Replace worn sleeves
or hubs.