Re-Mfg. HEAVY DUTY Torque Amplifier Assy.
CTPA-1251699HD-R Replacement Part to Fit:  Case/IH For Models: 1566, 1568, 1586, 3788, 6788 Match w/ driven gear 68142C2-R, 47 tooth 25 degree (the driven gear is not furnised as a part of the T/A Assembly)  Price:  $945.00  Buyers Club Price:  $850.50