Overview
The G2 Axle and Gear 3.73 rear ring and pinion, part G/21-2152-373, is a Dana 44 AdvanTEK gear set. Based on the product title and description, it is for the rear axle of 2018–2026 Jeep Wrangler JL models.
A 3.73 is the numerically lowest rear gear in this group. It keeps engine speed down on the highway, and it gives up some low-speed torque multiplication to get there.
The rear gears carry the engine’s drive to both rear wheels, so the 3.73 pair suits owners who mostly drive on pavement and want quieter, lower-speed cruising. Trail-focused owners with larger tires usually pick a numerically higher ratio instead.
Key features
- Forged from 8620 steel
- Precision-machined to OE specifications
- Heat treated for added durability
- Lapped mating surface for a smoother, quieter gear mesh
Break-in and first drive
Any new rear gear set needs a short break-in before the vehicle sees full load. Gentle acceleration and moderate highway speeds for the first stretch of driving let the tooth faces seat evenly. Avoid hard launches and towing until the pattern has been checked and the fasteners have settled.
The rear pair works with the rest of the drivetrain, so the driveshaft angles, the pinion yoke and the axle shafts should be inspected at the same time. Gear oil choice matters too, since a fluid suited to limited-slip use protects the teeth under heavy torque. A shop that sets gears regularly can usually check all of this during one visit.
- Inspect the driveshaft angles after the install
- Replace the gear oil if the shop finds contamination
- Keep a log of the first service intervals
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | G/21-2152-373 |
| Axle location | Rear |
| Axle type | Dana 44 AdvanTEK |
| Gear ratio | 3.73 |
| Material | 8620 steel, forged |
| Surface | Lapped mating surface |
Vehicle fitment
Based on the product title and description, this rear 3.73 set is for the Dana 44 axle of 2018–2026 Jeep Wrangler JL models.
Wranglers from the 2007–2018 JK years are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rear gear sets are best installed by a shop with pinion depth and backlash gauges. The carrier bearings and pinion preload are set during the install, so plan on a full set of install parts.
What’s included
One 3.73 ring and pinion gear set for the rear Dana 44 axle.
Not included: install bearings, shims, the pinion nut and seals.
