This core is extremely rare and your core is required to fulfill this order. Contact us for instructions on sending your core in for Rebuild & Return.Includes: PPA, F400261 (Flywheel Side Transmission Disc) & K38260-14450 (Captive PTO Disc)The F40693U 8-1/2" Dual Stage Clutch Unit - Reman fits equipment brands such as: Case IH, Ford, New Holland