Overview
The Crown Automotive 4864845 is a Dana 30 pinion crush spacer collar. It holds the correct pinion bearing preload and is made for late model factory style ring and pinion sets. The collar sits on the pinion shaft during assembly, so preload is set when the pinion nut is tightened.
It is a front Dana 30 collar for the TJ axle type, and it is a direct fit for the Jeep models below.
Key features
- Dana 30 pinion crush spacer collar
- Maintains proper pinion bearing preload
- For use with late model factory style ring and pinions
- Front axle position, direct fit
Preload and pinion nut work
Pinion preload is the resistance of the bearings when they are turned, and it has to be correct for the gears to last. A crush collar is designed to compress to a set preload as the pinion nut is torqued, so the process should be done in small, controlled steps. Going past the target preload is the most common error, and it can overheat the bearings.
Work with clean parts and a torque wrench suited to the job. Check the pinion depth separately, because it is set with shims or a depth gauge and a new collar will not correct it. Record the preload reading during assembly so you can confirm the setting before the axle goes back together.
- Use a new collar when the old one has been crushed
- Set pinion depth separately from preload
- Record the preload reading during assembly
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | 4864845 |
| UPC | 848399009583 |
| Part type | Pinion crush spacer collar |
| Axle | Dana 30 TJ |
| Axle location | Front |
| Fitment | Direct fit |
Vehicle fitment
It fits the 1999-2004 Jeep Grand Cherokee (WJ), 1997-1998 Jeep Grand Cherokee (ZJ), 2004-2006 Jeep Wrangler (LJ) Unlimited and 1997-2006 Jeep Wrangler (TJ).
The years are limited to the listed ranges, so the 1993-1996 ZJ and the 2005 LJ are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The pinion nut has to be tightened to the factory preload, and the collar should not be reused once it has been crushed to a set preload. Check the bearing preload on the pinion after the collar is installed, and confirm the ring and pinion style is a late model factory style before fitting.
What’s included
One Dana 30 pinion crush spacer collar.
