| • | Worn or damaged splines |
| • | Damaged threads |
| • | Excessive wear or scoring on the sealing surface |
| • | Worn gear teeth |
| • | Worn or damaged splines |
| • | Excessive wear or scoring on the sealing surface |
| • | Worn gear teeth |
| • | Pitting |
| • | Scoring or grooves |
| • | Excessive wear or heat discoloration |