This is a A-1981315C1 Trans Disc: 12" PN: 1981315C1Main Description As Following : A-1981315C1 Trans Disc: 12" P.N: 1981315C1 Spline Count: 22Spline Diameter: 1.4375" Replaces: A155236-R CASE , 1981315B CASE Found in Section & Models : Clutch Parts > Powershift, Case-IH TRACTOR: 1370 (S/N 8727601>), Case-IH TRACTOR: 2470 Associated Items : New Also A-CA-O-1370LATE, A-CA-P-1370E, A-CA-P-1370L, A-CA-S-12701370, A-SMC203, A-CA-O-2470LATE, A-CA-O-2470MID3, A-CA-P-2470, A-CA-S-2470, A-CA-S-2470LATE And : Spline Count: 22 Spline Diameter: 1.4375"