Countershaft: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 4 Speed, Hydramatic (M20) | ||||
| Countergear Shaft | 4.9 | 3.5 | B | Includes: R&R Transmission. |
| Note | ||||
| With Skid Plate, Add | 0.5 | 0.3 | B | |
| 5 Speed, Hydramatic (MG5/MY2/M50) | ||||
| Countershaft and/or Bearings | ||||
| Countershaft | 7.7 | 5.5 | B | Includes: R&R Transmission. |
| Countershaft Bearings | 7.6 | 5.4 | B | Includes: R&R Transmission. |
| Note | ||||
| With Skid Plate, Add | 0.5 | 0.3 | B |