Mainshaft: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 4L80E | ||||
| Gear Unit Assembly | ||||
| Without 3500 HD | 6.6 | 4.8 | A | Includes: R&I Transmission. |
| With 3500 HD | 7.3 | 5.1 | A | Includes: R&I Transmission. |
| Note | ||||
| With Skid Plate, Add | 0.5 | 0.3 | A |