Overview
The Jeep NP231 front output yoke seal washer, part number 4446487, is a small washer for the front output yoke of an NP231 transfer case. It goes behind the yoke nut washer to keep oil from seeping through the yoke splines. No vehicle years or models are given.
Key features
- Seal washer for the NP231 front output yoke
- Fits behind the yoke nut washer
- Helps stop oil from seeping through the yoke splines
- Part number 4446487 and UPC 70000363556
Yoke seal and leak checks
On an NP231 transfer case, the front output yoke is where the driveshaft connects, and the yoke seal keeps lubricant from working out along the splines. A small washer behind the yoke nut helps the seal sit flat and reduces leaks that appear as wet spots on the front of the case or the driveshaft. Leaks at this point often start after the yoke has been removed and reinstalled.
When reassembling, clean the yoke splines and the seal surface, then tighten the yoke nut to the correct torque for your setup. Check the yoke for pitting, the seal lip for hardening and the washer for distortion. Refill the transfer case to the proper level after the work and recheck for seepage after the first few drives.
- Clean the yoke splines before assembly
- Check the seal for hardening
- Inspect the case for wet spots
Specifications
| Brand | Jeep |
|---|---|
| Part number | 4446487 |
| UPC | 70000363556 |
| Part type | Seal washer |
| Application | NP231 transfer case, front output yoke |
| Fitment | Direct fit (no years or models stated) |
Vehicle fitment
This washer is for the NP231 transfer case front output yoke. Confirm fit for your vehicle’s year, model and transfer case before ordering.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Position the seal washer behind the yoke nut washer. Support the vehicle securely on stands before removing the yoke.
What’s included
One seal washer, part number 4446487. Check the package contents against your installation before starting.
