Transmission Diagnoses

Please add to these Transmission Diagnoses and Corrections based on your experience.

Difficulty Switching Gears

• First gear won't go in if car rolling

• • By design: 1st gear is not sychro

• Noise, trouble shifting into one specific gear

• • Bad synchro

• • Bad gear, perhaps chipped

Slips Out of Gear

Although rarely occuring this is one of the weak points of the 56- and 60- transmission designs.

• Shifter mechanism

• chipped gear

Noisy

Component Determination

Try to determine if it is a transmission or some other component:

• Clutch pedal down, noise goes away. Clutch pedal up, noise starts

• • Transmission input shaft or counter gear

• Noise only when clutch pedal depressed

• • Throwout Bearing is bad

• Noise at any gear, at certain road speed

• • Differential

• Vibration in any gear, at certain higher speed

• • Propeller Shaft

• Noise in a particular gear over a range of speed. No noise in lower or higher gear

• • Transmission

Potential Causes

• Low on gearbox oil

• • Leak

• • Not filled with enough oil

• • Filled too full

• Worn bearings (whine at high speed)

• Bad bearings or bushing (knock at low speed)

• Clunk - worn splines

Vibrations

See main article: Vibration