Cause
| Action
|
DEFINITION: The
clutch does not disengage completely to allow smooth shift operations. It may cause gear clashing while the vehicle is not moving, at idle, and shifting
out of neutral, or hard shifting in and out of gears while driving the
vehicle.
Review the
Symptoms - Clutch
and perform the necessary inspections.
|
Pedal blocked from full travel
|
- Inspect for obstacles that will prevent the pedal from going
to the floor.
- Clear any obstacles from under the pedal area, such as floor mats
or interior panels.
|
Too much travel between pedal and clutch
master cylinder
|
- Inspect the pedal for worn bushings.
- Replace the pedal bushings if worn. Refer to
Clutch Pedal Replacement
.
|
Clutch pedal mounting loose
|
- Inspect the clutch pedal mounting bracket for loose or missing
fasteners.
- Replace or repair the fasteners. Refer to
Clutch Pedal Replacement
.
|
Linkage at pedal worn or damaged
|
- Inspect the linkage at the pedal for excessive wear.
- Repair or replace the linkage as required. Refer to
Clutch Pedal Replacement
.
|
Clutch master cylinder seized or binding
|
- Inspect the master cylinder for the piston being able to move
freely and full range of travel.
- Repair or replace the clutch master cylinder as required. Refer
to
Clutch Master Cylinder Replacement
.
|
Air in the clutch hydraulic system
| Bleed the
clutch hydraulic system. Refer to
Hydraulic Clutch Bleeding
.
|
Clutch actuator cylinder
seized or binding
|
- Inspect the clutch actuator piston for moving freely.
- Replace the clutch actuator cylinder if the piston is binding.
Refer to
Clutch Concentric Actuator Cylinder Replacement
.
|
Clutch master cylinder leaking
internally
|
- Inspect for proper pedal reserve.
1.1. | Let up halfway on pedal. |
1.2. | Apply the pedal a few times. |
1.3. | Inspect to ensure there is still the proper pedal reserve. |
- Replace the clutch master cylinder if it will not hold pedal reserve.
Refer to
Clutch Master Cylinder Replacement
.
|
Damaged clutch assembly
components
|
- Remove the clutch assembly.
- Inspect the following clutch assembly components for damage:
• | Damaged clutch disc hub splines |
• | Broken or warped pressure plate |
- Replace the clutch assembly if any of the above damage is found.
Refer to
Clutch Assembly Replacement
.
|
Excessive side loading
on the release bearing
|
- Inspect the following clutch system components:
• | Worn or damaged pilot bearing |
• | Excessive flywheel runout |
• | Excessive engine to transmission misalignment |
- Repair or replace any faulty components.
|
Faulty
pilot bearing
| Replace the pilot bearing. Refer to
Clutch Pilot Bearing Replacement
.
|
Transmission
input shaft splines worn or damaged
| Replace the transmission input shaft. Refer to
Transmission Disassemble
in Manual Transmission - NV 3500 - Unit Repair or
Transmission Disassemble
in Manual Transmission - NV 1500 - Unit Repair.
|
Tight or contaminated clutch disc splines
|
- Clean the clutch disc and input shaft splines.
- If the clutch disc will not clean, replace the clutch assembly.
Refer to
Clutch Assembly Replacement
.
|
Flywheel housing,
engine block to clutch housing, or transmission front case excessively
misaligned
|
- Inspect the transmission front case for being faulty.
- Replace the transmission front case half. Refer to
Transmission Disassemble
in Manual Transmission
- NV 3500 - Unit Repair or
Transmission Disassemble
in Manual Transmission - NV 1500 - Unit Repair.
|
Grease or oil contamination on
the clutch discs facing
|
- Repair the oil leak.
- Repair the grease leak.
- Clean the clutch disc facing and the other clutch assembly components.
- Replace the clutch assembly if it will not clean. Refer to
Clutch Assembly Replacement
.
|