Model number: TRA7779
Replace a worn ring gear with a direct-fit 42-tooth unit that restores smooth differential operation. Ideal for X‑Maxx owners and hobbyists who do their own drivetrain repairs.
Product Details
Replace a worn ring gear with a direct-fit 42-tooth unit that restores smooth differential operation. Ideal for X‑Maxx owners and hobbyists who do their own drivetrain repairs.
Needed to Complete (not included):
- Hobby knife
- Glue
- Paint and finishing tools
NOTE: Photo of completed model is for illustrative purposes only. This is a model kit that requires assembly.
More info
The Traxxas Differential Ring Gear is a direct-replacement 42-tooth ring that restores proper gear mesh and drivetrain function. It’s designed for hobbyists and technicians who service X‑Maxx differentials and want a reliable, drop-in option that works with the correct pinions.
Key Features
- 42-tooth design matches the original gear count for correct engagement and smooth operation.
- Compatible with 7777 13-tooth front differential pinion gear and 7778 13-tooth rear differential pinion gear for proper pairing.
- Precision-cut teeth for consistent contact and dependable performance under load.
- Direct replacement fit so you can return the differential to service quickly after maintenance or repair.
Technical Specifications
- Tooth count: 42
- Compatible pinions: 7777 (13-tooth front), 7778 (13-tooth rear)
- SKU: TRA7779
Why Choose This Product
The Traxxas Differential Ring Gear is a straightforward way to fix worn or damaged ring gears without modifying the drivetrain. It’s ideal for anyone maintaining X‑Maxx trucks who needs an exact-fit replacement that pairs with the 7777 and 7778 13-tooth pinions.
About the Brand
OEM Diff Part
OEM diff part. Rebuilt it, working great!