Mainshaft: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 4L80E | ||||
| Gear Unit Assembly | 8.8 | 6.4 | A | Includes: R&I Transmission. |
| Note | ||||
| With Skid Plate, Add | 0.5 | 0.3 | A |
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 4L80E | ||||
| Gear Unit Assembly | 8.8 | 6.4 | A | Includes: R&I Transmission. |
| Note | ||||
| With Skid Plate, Add | 0.5 | 0.3 | A |