Troubleshooting Grizzly ATV Drive Train issues
The following conditions may indicate damaged shaft drive components:
Possible Causes
- A pronounced hesitation or "jerky" movement during acceleration, deceleration, or sustained speed. (This must not be confused with engine surging or transmission characteristics.)
- Bearing damage.
- Improper gear lash.
- Gear tooth damage.
- Broken drive shaft.
- Broken gear teeth.
- Seizure due to lack of lubrication.
- Small foreign objects lodged between the moving parts.
- A "rolling rumble" noticeable at low speed; a high-pitched whine; a "clunk" from a shaft drive component or area.
- A locked-up condition of the shaft drive train mechanism, no power transmitted from the engine to the front and/or rear.
Areas A, B, and C above may be extremely difficult to diagnose. The symptoms are quite subtle and difficult to distinguish from normal machine operating noise. If there is reason to believe these components are damaged, remove the components and inspect them.
Inspection Notes
- Investigate any unusual noises.
- A "rolling rumble" noise during coasting, acceleration, or deceleration. The noise increases with front and/or rear wheel speed, but it does not increase with higher engine or transmission speeds. Diagnosis: Possible wheel bearing damage.
- A "whining" noise that varies with acceleration and deceleration. Diagnosis: Possible incorrect reassembly, too-little gear lash.
The following "noises" may indicate a mechanical defect:
