The VFD Twin Transmission (Patent Pending) kit is an evolution of the original VFD. Taking the same balance of performance, scale appearance, strength, and adding industry first features. The VFD Twin comes equipped with selectable overdrive and rear dig. Twin shifting transfer case utilizes replaceable bearing plates, a brass pivot for the shift arms, and chromoly shift slides. Borrowing from our proven Hurtz dig, the VFD twin shifting is smooth and reliable. On the fly overdrive shifting from 6.5% to 46% makes an immediate change to the driving characteristics and tuning options. The VFD Twin transmission places the motor forward and as low as possible. Compatible with 540 brushed and brushless motors*