Pinpoint Test G: Excessive Noise

Manual Transaxle and Clutch

Pinpoint Tests

Pinpoint Test G: Excessive Noise

Normal Operation

The manual transaxle is controlled by a floor-mounted gearshift lever located in the floor console. Connection between the floor-mounted gearshift lever and the manual transaxle gearshift control assembly is made through 2 gearshift cables.

When the operator moves the floor-mounted gearshift lever, that movement is transmitted through 2 gearshift cables routed through the body to the transaxle. The 2 gearshift cables are attached to the transaxle at the gearshift control assembly. The gearshift control assembly transfers the movement of the gearshift cables to the shift rods and shift forks located inside the transaxle.

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 transaxle components
- Clutch pedal
- Clutch slave cylinder
- Clutch pressure plate
- Clutch disc



PINPOINT TEST G: EXCESSIVE NOISE

-------------------------------------------------
G1 TRANSAXLE NEUTRAL GEAR ROLLOVER TEST


- Start the engine and let it idle.
- NOTE: With the clutch pedal fully pressed, the input shaft should stop rotating.
- Press the clutch pedal.
- Does the noise stop when the clutch pedal is pressed?

Yes
REFER to Manual Transmission/Transaxle for transaxle concerns. Manual Transmission/Transaxle


No
GO to G2.

-------------------------------------------------
G2 CHECK THE CLUTCH PEDAL FREE PLAY


- Press the clutch pedal lightly by hand.
- Measure the distance the clutch pedal travels.
- Is the clutch pedal travel within 5-13 mm (0.20-0.51 in)?

Yes
GO to G3.

No
CHECK the clutch pressure plate for damage. REFER to Clutch Pressure Plate Check Procedures.

-------------------------------------------------
G3 CHECK THE CLUTCH SLAVE CYLINDER


- Remove the transaxle.
- Inspect the clutch slave cylinder for wear or loss of lubrication.
- Are there signs of wear or loss of lubrication?

Yes
INSTALL a new clutch slave cylinder.

No
GO to G4.

-------------------------------------------------
G4 CHECK THE TORSION SPRINGS


- Inspect the torsion springs for fatigue or breakage.
- Are there any signs of fatigue or breakage?

Yes
INSTALL a new clutch pressure plate.

No
INSPECT the crankshaft end play.

-------------------------------------------------