General Troubleshooting General Troubleshooting Chart The chart on the following pages contains some of the most common problems that may occur with this transmission along with the most common causes and solutions. Complaint
Cause
Noise - Growl / Rumble
Torsional Vibration.
Corrective Action
Check driveline angles for proper u-joint working angles. Check driveline for out of balance or [Noise may be most pronounced when transmission is in a “float” (low torque) damage. condition. May also be confined to a par- Check u-joints for proper phasing. Check clutch assembly for broken ticular vehicle speed.] damper springs. Check for inadequate clutch disc damping. Transmission bearing or gear failure. [Noise may be most pronounced under hard pull or coast (high torque).]
Check transmission oil for excessive metal particles.
Noise - Growl / Rumble at Idle (Idle Gear Rattle)
Excess engine torsional vibration at idle. Check for low engine RPM. Check for uneven engine cylinder performance. Check for proper clutch damper operation.
Noise - High Pitched Whine
Gear Noise. Isolate as to axle or transmission noise. If transmission, isolate to specific gear or gears.
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Check for worn or defective shift lever isolator. Check for direct cab or bracket contact with transmission (“grounding”). Check for proper driveline u-joint working angles. Check for damaged or worn gearing.
