Tamiya 51649 TRF420 Performance Gear Differential Assembly  [51649]

Stability and Serviceability with the TRF420 Differential

The Tamiya TRF420 Gear Differential Unit Set, part of the Tamiya Spare Parts Series, is built to improve the controllability of TRF-class cars. It is a compact, service-friendly unit for hobbyists focused on repeatable performance.

Highlighted Features of the Unit

• Lightweight Design: The pulley and case were revised to remove about 1.5g, helping reduce rotating mass and aid steering response.
• Enhanced Oil-Tightness: Sealing improvements limit oil loss and preserve the selected diff setting for longer sessions.
• Compatibility: Suitable for TRF420, TRF419, and TA07 chassis, giving flexibility across multiple models.

Practical Advice for Installing on TRF419 and TA07

When fitting to TRF419 or TA07, use shims to correct bearing position and avoid excessive preload. The recommended part is the Tamiya RC 10mm Shim Set (Item 53588) to achieve a proper fit.