| • | Plugged feed passages | 
| • | Worn or damaged splines | 
| • | Input shaft bushing (631) wear | 
| • | Seal ring groove nicks or burrs | 
| • | Cracks or blocked fluid passages in the input shaft | 
| • | Damage or wear to the thrust bearing (723) in the input clutch housing | 
| • | Cracks or damage to seal grooves | 
| • | Wear on piston lugs | 
Important: Do not attempt to reuse the third clutch piston and seal assembly.