Yokomo D-172 Front FCD 0.59 Reduction Gear for DP-series Ball Differential  [D-172]

How the 0.59 front reduction functions

The FCD (full counter drift) gear set alters the front-to-rear drive ratio on ball-differential setups to promote controlled counter-drift with DP-series drift package configurations. By cutting front speed to 0.59 of the rear (40T x 10T), the front under-rotates and demands more precise throttle and steering inputs than a matched-speed layout.

Used as a front reduction component, the gear is meant for vehicles running a ball differential and is optimised for drift tuning rather than outright top speed. Drivers will find the front provides a softer initial bite and the car requires careful throttle/brake modulation to keep the rear in check.

Installation guidance: verify correct gear mesh and differential preload after assembly, ensure bearings and lubricant are in good condition, and carry out staged track testing to refine settings safely. This item changes the vehicle's balance and is a dedicated tuning part for DP-series drift packages.