Overview
The G2 Axle and Gear 4-YJ2-410 is a 4.10 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 reverse front axle and a Dana 44 rear axle.
The front and rear sets arrive together with matched master installation kits. The 4.10 ratio is the lowest of the G2 YJ options, and the gears are made to original equipment specifications from computer heat treated 8620 steel.
Key features
- Front and rear 4.10 ratio ring and pinion sets
- Dana 30 reverse front and Dana 44 rear axles
- Matched master installation kits for both axles
- Computer heat treated 8620 steel
- Limited lifetime warranty
Break-in and setup
New ring and pinion gears need a short break-in period before they carry full load. Early driving should be gentle, with moderate speeds and steady throttle, while the gears seat against each other. Heavy towing and hard launches are best avoided until the gear marks look right and the noise has settled.
Setup matters as much as the gears themselves. Backlash and pinion depth are set on both axles, and the contact pattern should be checked with marking compound before the covers are closed. Fill each housing with the correct gear oil. Carriers matter too, since worn carriers can cause noise even with new gears, so inspect bearing play and carrier surfaces during the install.
- Gentle driving during the break-in stretch
- Check backlash and pinion depth on both axles
- Use marking compound to check tooth contact
- Inspect carriers for bearing play and wear
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | 4-YJ2-410 |
| UPC | 700007521681 |
| Gear ratio | 4.10 |
| Front axle | Dana 30 reverse |
| 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 reverse front and a Dana 44 rear.
The YJ years run 1987 to 1995, so the TJ, LJ and JK Wranglers are outside this kit’s stated fitment. Check your front axle is the reverse-cut Dana 30 before ordering. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The front axle type decides which front gears you need, so confirm the front is a Dana 30 reverse before installation. After installation, check pinion depth and backlash on both axles and keep each master installation kit with its own gear set.
What’s included
Front and rear 4.10 ring and pinion sets, plus matched master installation kits for both axles.
Not included: Carriers are outside this set.
