Overview
The Crown Automotive Dana 30/44, 8.25 Inner Pinion Bearing, part number CRO4746979, is an inner pinion bearing for Dana 30 and Dana 44 axles and Chrysler 8.25 rear axles. It is designed for the inner position.
Further applications include 07–18 Wrangler JK with a Dana 30 or 44 front axle, 05–10 Grand Cherokee WK with a Chrysler 8.25 rear axle, 06–10 Commander XK with a Chrysler 8.25 rear axle, and 76–86 CJ models with an AMC 20 rear axle.
Key features
- Inner position pinion bearing
- Covers Dana 30, Dana 44 and Chrysler 8.25 axle applications
- Application notes include Wrangler JL 2 and 4 Door with Dana 30 front axles
- Part number CRO4746979 from Crown Automotive
Rebuilding the pinion assembly
An inner pinion bearing is one part of a larger assembly that also includes the pinion, the outer bearing, the crush sleeve or collapsible spacer, and the seal. When one bearing is replaced, the rest of the stack should be inspected, because a worn outer bearing or pitted pinion journal will shorten the life of a fresh bearing.
Bearings are sensitive to contamination and rough handling. Keep the new bearing in its wrapper until it is ready to press in, and use a proper driver so the load goes through the race rather than the rollers. A bearing that has been hammered out of position will often fail early with no obvious sign until the noise begins.
After assembly, rotate the pinion by hand and check for smooth, even resistance. Roughness or sudden tight spots mean the bearing should be checked again before the axle goes back into service.
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | CRO4746979 |
| Position | Inner |
| Axle applications | Dana 30, Dana 44, Dana 35 rear, Chrysler 8.25 and AMC 20 rear |
Vehicle fitment
It fits the 2007–2018 Jeep Wrangler (JK), 1999–2004 Grand Cherokee (WJ), 2005–2010 Grand Cherokee (WK), 1994–1998 Grand Cherokee (ZJ), 2002–2007 and 2008–2012 Jeep Liberty (KJ and KK), 2006–2010 Jeep Commander (XK), 2007–2011 Dodge Nitro, 1976–1986 CJ5 and CJ7, 1980–1986 J10, 1986 J20, 1981–1985 Scrambler and 1980–1983 Jeep Cherokee (SJ), with trims covered for each. Confirm fit for your vehicle’s year, model and trim before ordering.
Wrangler JL is named in the application notes but is not on the manufacturer list. Other years and models are not on the list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Pinion bearings are set during gear service, and bearing preload and pinion depth should be checked by a professional before the carrier goes back together.
What’s included
This item is an inner pinion bearing only. A cup, shims or other carrier parts are not included, so plan for them separately if your rebuild needs them.
