GRIT GEARS 4340 Chromoly Rear Axle Kit for Jeep Wrangler JL and Gladiator Narrow Track models w/e Locker 32 Spline

GRIT GEARS 4340 Chromoly Rear Axle Kit – Jeep Wrangler JL & Gladiator JT Narrow Track (Dana 44 M220)

Part Numbers:

• RH: GR-AX-401382
• LH: GR-AX-401383

Premium 4340 chromoly rear axle kit for Jeep Wrangler JL and Gladiator JT Rubicon Narrow Track models with electronic locker. Features cold roll formed splines and advanced heat treating for maximum strength and durability. Includes Timken bearings, wheel studs, seals, and retainers. Accommodates 5x5 and 5x5.5 bolt patterns. The superior strength of 4340 chromoly material provides enhanced durability and reliability compared to standard axles — ideal for lifted builds, aggressive terrain, and increased payload demands.

Specifications

• Differential: Dana 44 M220 – JL & JT Rubicon Narrow Track
• Material: 4340 Chromoly Steel
• Spline Count: 32 Spline
• Length: LH – 31.56" | RH – 33.25"
• Bolt Pattern: 5x5 and 5x5.5
• Location: Rear
• Axle Seals: Included
• Kit Includes: Timken bearings, wheel studs, seals, and retainers

Technical Notes

• Fits axle code DRE (Narrow Track M220) and DSE (e-Locker Rear Axle)
• Small Bearing (Set10): 1.562" ID / 2.875" OD bearing category

Fitment

Fits Jeep Wrangler JL (2018+) and Jeep Gladiator JT (2020+) Rubicon Narrow Track models with Dana 44 M220 rear axle and electronic locker.

Warranty

10-Year Warranty covering manufacturing defects, axle breakage, bent axles, and twisted splines. Non-transferable. Boots, bearings, and seals covered under a separate 1-Year Warranty.

About Grit Gears

Grit Gears is the premier destination for high-performance ring and pinion gears and heavy-duty axle shafts. Precision-engineered for flawless fitment, exceptional wear resistance, and maximum power delivery — built to endure the absolute limits of automotive performance.