Pinpoint Test A: Clutch Vibration

Manual Transmission and Clutch

Pinpoint Tests

PINPOINT TEST A: CLUTCH VIBRATION

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A1 CHECK ENGINE COMPONENTS FOR GROUNDING


- NOTE: Make sure the clutch is the cause of the vibration concern. The vibration should occur during clutch operation. The clutch can also be difficult to engage or disengage. Eliminate all related systems before checking the clutch components.
- NOTE: Check the driveline angles and driveshaft runout before disassembling the clutch system. Refer to Differential Assembly &/or Axle Shaft Assembly &/or Drive/Propeller Shafts, Bearings and Joints.
- Check the powertrain/drivetrain mounts, exhaust manifolds or other engine components for grounding on the chassis.
- Are any mounts or engine components grounded?

Yes
REPAIR as necessary. TEST the system for normal operation.

No
GO to A2.

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A2 CHECK FOR LOOSE CLUTCH PRESSURE PLATE BOLTS


- Check for loose clutch pressure plate bolts. Inspect the clutch pressure plate for damage or for material between the pressure plate and flywheel.
- Are there any loose bolts or damage?

Yes
TIGHTEN the bolts to specifications or if damaged, INSTALL a new clutch pressure plate. REFER to Clutch, M/T. TEST the system for normal operation.

No
GO to A3.

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A3 CHECK THE CLUTCH DISC SPRINGS


- Check for worn, broken or loose clutch disc springs.
- Are the clutch springs worn, broken or loose?

Yes
INSTALL a new clutch disc. REFER to Clutch, M/T. TEST the system for normal operation.

No
GO to A4.

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A4 CHECK THE CLUTCH DISC SPLINES


- Inspect the clutch disc splines for damage or wear.
- Is there damage or wear?

Yes
INSTALL a new clutch disc. REFER to Clutch, M/T. TEST the system for normal operation.

No
GO to A5.

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A5 CHECK THE FLYWHEEL BOLTS


- Check for loose flywheel bolts.
- Are the bolts loose?

Yes
TIGHTEN the bolts to specifications. REFER to Engine. TEST the system for normal operation.

No
GO to A6.

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A6 CHECK THE FLYWHEEL SURFACE


- Inspect the flywheel surface for wear or damage. Refer to Engine.
- Is there any damage or excessive wear?

Yes
INSTALL a new flywheel. REFER to Engine. TEST the system for normal operation.

No
Clutch system normal. CONDUCT a diagnosis on other suspect systems.

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