The TRF421X gear differential joints (ball bearing type) can be used to replace a worn-out part for the TRF421X (Item 42391) or used as an upgrade to the standard TRF421 (item 42384).
Product Details
In The Box
Gear Differential Joints2
The TRF421X gear differential joints (ball bearing type) can be used to replace a worn-out part for the TRF421X (Item 42391) or used as an upgrade to the standard TRF421 (item 42384).
Product Details
In The Box
Gear Differential Joints2