Overview
The G2 Axle and Gear 4.56 ring and pinion, part G/21-2149-456, is a rear Dana 35 AdvanTEK gear set for 2018–2026 Jeep Wrangler JL models.
The 4.56 ratio sits between the 4.10 and 4.88 options in the same G2 line. Its numerically higher gearing gives more torque multiplication at low speed than 4.10.
Ring and pinion gears set the final drive ratio, so the 4.56 pair changes how the axle shares engine speed between the road and the wheels. Owners often compare it with the 4.10 when they weigh highway comfort against low-speed pulling power on a JL.
Key features
- Forged from 8620 steel to form a strong gear base
- Machined to OE specifications using tight tolerances
- Heat treated for durability in daily-driven use
- Lapped mating surface to cut friction and wear
- Designed for the loads of performance vehicles
Gearing for loaded driving
A 4.56 ratio sits in the middle of the range, giving a balance between low-speed pull and steady cruising. It helps when carrying gear, pulling a trailer, or running steep grades where engine speed would otherwise drop too far. Highway driving stays comfortable without the constant high engine speed a numerically higher set would produce.
Changing ring and pinion gears also changes speedometer reading and how the transmission shifts, so the change should be considered as a whole. Install parts such as bearings, shims and seals need to be right, and a proper setup with gauges keeps noise down. Tire size matters too, because it shifts the effect of any ratio in either direction.
- Re-check speedometer calibration after the change
- Set pinion depth and backlash with gauges
- Inspect carrier bearings for wear before reuse
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | G/21-2149-456 |
| Axle location | Rear |
| Axle type | Dana 35 AdvanTEK |
| Gear ratio | 4.56 |
| Material | 8620 steel, forged |
| Surface | Lapped mating surface |
Vehicle fitment
Based on the product title and description, this 4.56 set is for the rear Dana 35 axle of 2018–2026 Jeep Wrangler JL models.
Wranglers from other years, such as the 2007–2018 JK, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
A gear swap of this kind should be done by a shop with pinion depth and backlash gauges. Run the new 4.56 pair through a gradual break-in before any sustained towing or high-speed work.
What’s included
One 4.56 ring and pinion gear set for the rear Dana 35 axle.
Not included: the carrier and pinion bearings, shim kit, crush sleeve and seals that the install requires.
