The Tamiya 51761 kit contains two 46mm drive shafts intended for double cardan joints and supplied in the ball bearing configuration to cut rotational losses in the driveline. These shafts are specified for the TRF421X chassis and may be fitted as direct replacements on TRF421X (Item 42391) or used to upgrade the standard TRF421 (Item 42384).
When installed, the ball bearing arrangement reduces speed loss through the joint under steering loads, helping to maintain consistent drive during cornering. For correct fitment on the TRF421 standard chassis, use Item 51762 Ball Bearing Set for Universal Shafts together with Item 51763 TRF421X Front Direct Cups (2pcs.) and Item 51764 TRF421X Gear Differential Joints (Ball Bearing Type) as listed in Tamiya service parts references.
Use Tamiya 51761 shafts to replace worn double cardan components or to bring a TRF421 up to the TRF421X shaft specification, pairing with the complementary parts shown for full installation.
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