This is a A-1813752C1 Ring Gear, Flywheel PN: 1813752C1Main Description As Following : A-1813752C1 Ring Gear, Flywheel P.N: 1813752C1 Inside Diameter: 16.180"Outside Diameter: 16.950"Teeth: 138Width: 0.740" Found in Section & Models : Engine Parts > Flywheels and Ring Gears, Case-IH TRACTOR: 4366, Case-IH TRACTOR: 4386, Case-IH TRACTOR: 5088, Case-IH TRACTOR: 5288, Case-IH TRACTOR: 5488 Associated Items : New Also A-IH-O-4366, A-IH-P-ENG56CYL, A-IH-P-4366, A-IH-S-ENG3400, A-IH-S-4366, A-IH-O-4386, A-IH-P-ENG56CYL, A-IH-P-4366, A-IH-S-ENG3400, A-IH-S-4366, A-IH-O-BATTIGN, A-IH-O-5088, A-IH-P-ENG56CYL, A-IH-P-5088, A-IH-S-AIRHEAT, A-IH-S-ENG3400, A-IH-S-TUNELATE, A-IH-S-5088, A-IH-O-BATTIGN, A-IH-O-5088 And : Inside Diameter: 16.180" Outside Diameter: 16.950" Teeth: 138 Width: 0.740"