Durable ABS composite differential case by 3RACING for 1/10 crawler chassis; reinforced housing improves gear alignment and bearing seating—useful as a replacement or tuning upgrade for maintenance and trail use.  [CRA-125]

Replacement differential case for crawler builds

What this part does

The 3RACING CRA-125 differential case is a replacement housing for scale crawler drivetrains. It holds the bevel gears and bearings that form the vehicle’s differential assembly, keeping gear mesh and bearing positions consistent during trail use and light-impact runs. Designed for 1/10-scale crawler platforms, it serves as a swap-in shell for repair or basic tuning tasks.

Fit, compatibility and material notes

Made from a reinforced ABS-style composite, this case focuses on dimensional stability rather than lightweight performance. That material choice helps maintain gear alignment and the seating of ball bearings under low-speed crawling loads. The part is intended for crawler-category chassis and standard 1/10-scale differential internals; confirm internal gear tooth counts and bearing sizes match your axle set before installation.

Practical setup tips

• Verify the internal gear mesh and bearing seating after reassembly: even small misalignment affects gear wear and diff smoothness.
• If replacing a damaged case, transfer bearings and internal gears in the same order to preserve preload and backlash settings.
• Check screw threads and mating surfaces for burrs or old thread-lock residue—clean mating faces to ensure the case seats flat and fasteners torque evenly.

Use-case comparisons

• Trail-focused builds: offers stable housing for slow technical crawling where consistent gear engagement matters more than weight savings.
• Weekend bashing or casual runs: serves as a practical, low-cost replacement after wear or impact damage to the original shell.
• Show or display rigs: keeps internals tidy and aligned for preserved operation during static use or light demonstrations.

Maintenance pointers

• Inspect for hairline cracks around screw bosses after impacts; replace if structural integrity is compromised.
• Apply appropriate differential fluid and re-check for leaks or seal migration when reassembling the unit.