Cobra Racing Rear Gearbox Housing – Traxxas Mini Maxx, Mini XRT & Mini Slash

Upgrade a critical drivetrain area on your Traxxas Mini platform with the Cobra Racing Rear Differential Gearbox Housing. This part replaces the factory rear gearbox / bulkhead housing with a stronger 7075-T6 aluminum upgrade designed to better support the rear differential, pinion gear area, and rear drivetrain assembly.

The rear gearbox housing does more than simply hold the diff in place. It helps maintain alignment, supports the rear-end structure, and plays a major role in how well the drivetrain holds up under power, braking, cornering, and impact. When the stock plastic housing flexes, wears, or takes a hard hit, it can affect gear mesh and overall durability. This Cobra Racing aluminum housing gives the rear end a stronger and more stable foundation.

If you bash hard, jump your RC, run high-speed setups, or simply want a more durable Mini build, this is a smart upgrade. The 7075-T6 aluminum construction adds rigidity where the factory plastic housing can be a weak point.

• Stronger rear differential support
• Helps reduce flex around the gearbox area
• Improves rear drivetrain stability
• Supports better gear and pinion alignment
• Built for bashing, racing, and high-performance driving
• Premium 7075-T6 aluminum construction

This listing is for the rear differential gearbox housing.

• Traxxas Mini Maxx BL-2s
• Traxxas Mini Rally VXL Ford RS200
• Traxxas Mini Slash 4X4
• Traxxas Mini XRT VXL-3s

• Replaces rear bulkhead / rear differential gearbox housing style: TRA10729

Please confirm your model and part number before purchase.

Installation requires removing the factory rear gearbox housing and transferring the necessary drivetrain components into the new aluminum housing. Check that the differential, bearings, pinion gear, and hardware are seated correctly before final assembly.

Recommended to use threadlocker when screwing into aluminum. After installation, rotate the drivetrain by hand to confirm everything spins smoothly before running the vehicle.

• 1x Cobra Racing Rear Differential Gearbox Housing
• 1x bag with various hardware / screws to ensure a full and complete install.

The Cobra Racing 7075-T6 Rear Differential Gearbox Housing is a serious upgrade for Traxxas Mini owners who want more strength, cleaner alignment, and better durability from the rear drivetrain. It replaces a key plastic housing with a stronger aluminum structure built to handle real RC abuse.

💡 Pro Tip: Pair this rear gearbox with the matching front gearbox and helical diff set for the ultimate Mini drivetrain upgrade.