Test C: Clutch Pedal Feels Spongy or Has Excessive Travel. Clutch Will Not Disengage

Pinpoint Test C: Clutch Pedal Feels Spongy or Has Excessive Travel. Clutch Will Not Disengage

Normal Operation
The clutch is designed to transfer the power from the engine to the transmission, which may be either stationary (starting) or rotating at a different speed (upshifting or downshifting). The clutch is functioning correctly when both the engine and transmission are rotating at the same speed with the clutch engaged. Clutch pedal movement is transmitted by fluid pressure, which actuates the clutch release hub and bearing. The clutch release hub and bearing pushes on the spring center towards the flywheel. The diaphragm spring pivots at the fulcrum, relieving the load on the clutch pressure plate. Steel spring straps riveted in the clutch pressure plate cover pull the clutch pressure plate from the clutch disc, disengaging the engine torque from the transmission.

This pinpoint test is intended to diagnose the following:
^ Internal operation
^ Clutch pedal reserve
^ Clutch slave cylinder travel
^ Clutch disc
^ Clutch pressure plate
^ Clutch pedal free play

C1-C3:

C4:

C4 (Continued)-C7: