Overview
The G2 Axle and Gear 5.38 ring and pinion, part G/21-2151-538R, is a front Dana 44 AdvanTEK gear set. The product title and description place it in 2018–2026 Jeep Wrangler JL models.
At 5.38, this is the numerically highest front ratio in the group. It has the most low-speed torque multiplication and the highest engine speed for a given road speed.
The 5.38 gives the most low-speed torque multiplication of the front Dana 44 ratios here. It is a choice for builds running much larger tires than stock, where the extra multiplication offsets the added rolling size, and the front carrier should be confirmed before ordering.
Key features
- Forged from 8620 steel
- Precision-machined to OE specifications with tight tolerances
- Heat treated for daily-driven durability
- Lapped mating surfaces to reduce friction and noise
Setting up high-ratio gears
Numerically high ring and pinion sets change how the front axle behaves, so the whole gear setup should be considered together. Tire diameter, transfer case ratio and transmission gearing all affect the final result. Plan the tire size and drivetrain setup before the gears are fitted, so the axle is set up for how the vehicle will be driven.
Fluid choice matters for gear life. Use a fluid designed for limited-slip or open differentials as the build requires, and change it after the break-in period. Gear contact should be checked with marking compound before the axle is returned to regular use, since uneven contact can point to a setup problem.
- Confirm tire size and drivetrain gearing together
- Use the fluid type the differential requires
- Check gear contact pattern with marking compound
- Change differential fluid after break-in
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | G/21-2151-538R |
| Axle location | Front |
| Axle type | Dana 44 AdvanTEK |
| Gear ratio | 5.38 |
| Material | 8620 steel, forged |
| Surface | Lapped mating surface |
Vehicle fitment
Based on the product title and description, this front 5.38 set is for 2018–2026 Jeep Wrangler JL models.
Earlier Wrangler JK models from 2007 to 2018 are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Gears this numerically high are the most sensitive to pinion depth and backlash, so set both with gauges and check the tooth contact pattern before the front axle goes back into service.
What’s included
One 5.38 ring and pinion gear set for the front Dana 44 axle.
Not included: the bearings, shims, crush sleeve and seals required for the install.
