This is a A-364432R91 Coupler, Torque Amplifier Drive Shaft w/o Snap Ring PN: 364432R91Main Description As Following : A-364432R91 Coupler, Torque Amplifier Drive Shaft w/o Snap Ring P.N: 364432R91 Does not include part # 364411R1 snap ring, currently not available from A & I. Found in Section & Models : Transmission & Rear Axle > Torque Amplifier Parts, Case-IH INDUSTRIAL/CONSTRUCTION: 2504, Case-IH INDUSTRIAL/CONSTRUCTION: 2544, Case-IH INDUSTRIAL/CONSTRUCTION: 2606, Case-IH INDUSTRIAL/CONSTRUCTION: 2656, Case-IH TRACTOR: SUPER MTA, Case-IH TRACTOR: SUPER W6TA, Case-IH TRACTOR: W6TA, Case-IH TRACTOR: 300 FARMALL, Case-IH TRACTOR: 330, Case-IH TRACTOR: 340, Case-IH TRACTOR: 350 FARMALL, Case-IH TRACTOR: 400 FARMALL, Case-IH TRACTOR: 450 (Farmall), Case-IH TRACTOR: 460, Case-IH TRACTOR: 504, Case-IH TRACTOR: 544, Case-IH TRACTOR: 560, Case-IH TRACTOR: 606, Case-IH TRACTOR: 656, Case-IH TRACTOR: 660 Associated Items : New Also A-IH-O-2504-I, A-IH-O-3121, A-IH-P-3082, A-IH-P-5042504, A-SMIH201, A-IH-O-3121, A-IH-P-ENG-4DSL, A-IH-P-ENG14CYL, A-IH-S-544UTIL, A-IH-O-2606, A-IH-O-3121, A-IH-P-3082, A-IH-P-6062606, A-SMIH25, A-IH-P-6562656, A-IH-S-ENG460ETC, A-IH-S-ENG6CYLG, A-IH-S-HYDROTRN, A-IH-S-656CHASIS, A-IH-C-MUSCLES And : Does not include part # 364411R1 snap ring, currently not available from A & I.