Mainshaft: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 4 Speed, Hydramatic (M20) | 4.6 | 3.2 | B | Includes: R&R Transmission. |
| Note | ||||
| With Skid Plate, Add | 0.5 | 0.3 | B | |
| 5 Speed, Hydramatic (MG5/MY2/M50) | 5.9 | 4.4 | B | Includes: R&R Transmission. |
| Note | ||||
| With Skid Plate, Add | 0.5 | 0.3 | B |