Parts & installation
Manufacturer documented- Vehicle
- Traxxas TRX-4 Ford F-15092144-4
- Position
- front / rear
- Change
- Use front overdrive, rear underdrive or both to change the front-to-rear wheel-speed relationship
Parts needed
Sold packages for one selected configuration| Part | Qty |
|---|---|
| 8287Overdrive differential ring-and-pinion gear set, one axle | 1 |
Traxxas lists this package for the stated vehicle configuration. Check previously fitted upgrades and modifications before ordering.
Installation notes
- Choose one route: 8287 in the front with standard rear gears, 8288 in the rear with standard front gears, or both in those respective axles. One sold ring-and-pinion set services one axle.
- Install each ring and pinion as its matched pair. Changing both axles to the same ratio does not create front-to-rear speed bias.
- Traxxas demonstrates the combined front-overdrive/rear-underdrive setup for dedicated crawling. The single-axle routes provide less speed difference.
- Axle-speed bias increases driveline load and can increase motor/ESC temperature and reduce runtime. Fast trail handling can become more prone to sliding.
Sources
Exact-model Traxxas parts list, 92144-4 (opens in a new tab)
- Factory parts list identifies the stated package and its application; optional equipment is distinct from standard replacement parts.
Traxxas TRX-4 axle overdrive explained (opens in a new tab)
- Axle-speed bias options and the motor-temperature, runtime and handling tradeoffs.
Traxxas TRX-4 competition build (opens in a new tab)
- Traxxas demonstrates front 8287 overdrive with rear 8288 underdrive for a dedicated crawling setup.