Overview
The G2 Axle and Gear 4-YJ2-456 is a 4.56 ratio front and rear ring and pinion kit for the Jeep Wrangler YJ. The YJ chassis code in the title covers the 1987-1995 Wrangler. The kit is set up for a Dana 30 front axle and a Dana 44 rear axle, so both ends of the driveline are changed with one purchase.
The set includes matched master installation kits for the front and rear axles. G2 manufactures the gears to original equipment specifications from computer heat treated 8620 steel, and the kit carries a limited lifetime warranty.
Key features
- Front and rear 4.56 ratio ring and pinion sets
- Dana 30 front axle and Dana 44 rear axle
- Matched front and rear master installation kits
- Computer heat treated 8620 steel gears
- Manufactured to original equipment specifications
- Limited lifetime warranty
Measuring before you buy
Before buying a ring and pinion set, confirm the axles in the Jeep match the set’s intended housings. Axle identification tags, housing casting marks and the axle ratio on the existing carrier help confirm the setup. A mismatch between the housing and the gears is hard to correct once the parts are on order.
Think about how older Wranglers are used. Axle housings from earlier years can show wear, and older differentials may need new bearings or seals during the swap. Inspect the carrier, axle tubes and seals while everything is apart, and replace parts that show wear so the new gears have a sound base.
- Check axle housing markings before ordering
- Measure current gear ratio if it is unknown
- Inspect bearings and seals during the job
- Replace worn carrier parts while apart
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | 4-YJ2-456 |
| UPC | 700007521691 |
| Gear ratio | 4.56 |
| Front axle | Dana 30 |
| Rear axle | Dana 44 |
| Material | Computer heat treated 8620 steel |
| Warranty | Limited lifetime |
Vehicle fitment
Fitment is taken from the product name, which gives the YJ chassis code for the Jeep Wrangler (YJ), 1987-1995. The kit is set up for a Dana 30 front and a Dana 44 rear.
The YJ years run 1987 to 1995. The later TJ, LJ and JK Wranglers are outside those years and are not covered by this kit. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Measure pinion depth and gear backlash after the new sets are installed, and keep the master installation kits with their matching front and rear gears. The gears wear quickly if the carrier is not set up correctly, so have the setup checked with the proper tools.
What’s included
Front and rear 4.56 ring and pinion sets, plus matched master installation kits for both axles.
Not included: The carriers are not part of this kit.
