Overview
The G2 Axle and Gear 4.88 rear ring and pinion, part G/21-2152-488, replaces the gears in a rear Dana 44 AdvanTEK axle. Based on the product title and description, it fits 2018–2026 Jeep Wrangler JL models.
The 4.88 ratio is one step numerically higher than 4.56, so it gives more torque multiplication at low speed. G2 engineers the set for the heavier loads of performance vehicles.
The 4.88 pair is the step up from 4.56 on the rear Dana 44, adding torque multiplication for heavier loads or larger tires. The rear axle needs its pinion and carrier set up together, so plan on a matching install kit.
Key features
- Forged from 8620 steel
- Machined to OE specifications with tight tolerances that ease setup
- Heat treated for added durability
- Lapped mating surface to reduce friction
Rear gearing and driveline
A change in rear ratio affects more than engine speed. The driveshaft angles, the speedometer reading and the way the vehicle pulls under load can all shift. Look at the driveline geometry before and after the change, and correct any angle that has moved beyond what the u-joints can handle comfortably.
Speedometer accuracy is a common concern after regearing. A different ratio changes how fast the speedometer reads at a given road speed, so recalibration or an electronic correction is often used. Inspect the rear axle seals and check for leaks once the new gears have been run through a full day of driving.
- Check driveshaft angles after regearing
- Recalibrate the speedometer
- Inspect rear axle seals for leaks
- Set pinion depth and backlash with gauges
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | G/21-2152-488 |
| Axle location | Rear |
| Axle type | Dana 44 AdvanTEK |
| Gear ratio | 4.88 |
| Material | 8620 steel, forged |
| Surface | Lapped mating surface |
Vehicle fitment
Based on the product title and description, this rear 4.88 set is for the Dana 44 axle of 2018–2026 Jeep Wrangler JL models.
Earlier Wrangler JK models from 2007 to 2018 are not covered by this set. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
A pair this numerically high needs precise pinion depth and backlash, so have the install done with gauges and a pattern check, not by feel.
What’s included
One 4.88 ring and pinion gear set for the rear Dana 44 axle.
Not included: the master install parts, such as bearings, shims and the pinion nut.
