Case: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| NP-242 | ||||
| Rear Case | ||||
| Manual Trans | 3.0 | 2.1 | B | Includes: R&I Transfer Case. |
| Auto Trans | 2.7 | 1.9 | B | Includes: R&I Transfer Case. |
| NOTE | ||||
| With Skid Plate, Add | 0.1 | 0.1 | B | |
| Front Case | ||||
| Manual Trans | 3.5 | 2.4 | B | Includes: R&I Transfer Case. |
| Auto Trans | 4.0 | 2.9 | B | Includes: R&I Transfer Case. |
| NOTE | ||||
| With Skid Plate, Add | 0.1 | 0.1 | B | |
| NP231 Non-Synchro, NV231 | ||||
| Rear Case | ||||
| Manual Trans | 3.0 | 2.1 | B | Includes: R&I Transfer Case. |
| Auto Trans | 2.7 | 1.9 | B | Includes: R&I Transfer Case. |
| NOTE | ||||
| With Skid Plate, Add | 0.1 | 0.1 | B | |
| Front Case | ||||
| Manual Trans | 3.5 | 2.4 | B | Includes: R&I Transfer Case. |
| Auto Trans | 4.0 | 2.9 | B | Includes: R&I Transfer Case. |
| NOTE | ||||
| With Skid Plate, Add | 0.1 | 0.1 | B | |
| Extension Housing | 1.4 | 1.0 | B |