| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes |
| Replace |
| NP231 Non-Synchro, NV231 |
| Complete Assembly Without Transfer Of Parts | 1.8 | 1.3 | B | |
| Complete Assembly With Transfer Of Parts | 1.8 | 1.4 | B | Includes: R&I Transfer Case. |
| NV241 |
| Complete Assembly Without Transfer Of Parts | 1.5 | 1.1 | B | |
| NOTE |
| With Skid Plate, Add | 0.3 | 0.2 | B | |
| Complete Assembly With Transfer Of Parts | 1.8 | 1.1 | B | Includes: R&I Transfer Case. |
| NOTE |
| With Skid Plate, Add | 0.3 | 0.2 | B | |
| Overhaul/Rebuild |
| NP231 Non-Synchro, NV231 | 5.9 | 4.4 | A | Includes: R&I Transfer Case. |
| NV241 | 5.2 | 3.7 | A | Includes: R&I Transfer Case. |
| NOTE |
| With Skid Plate, Add | 0.2 | 0.2 | A | |