This is a A-363499R94-R Re-Mfg. Torque Amplifier Assembly PN: 363499R94-RMain Description As Following : A-363499R94-R Re-Mfg. Torque Amplifier Assembly P.N: 363499R94-R Drive gear has 20 Teeth, (Tooth Length = 1.300", Bearing Bore = 2.460"), w/ belt pulley driving gear (39 Teeth). Crossed From: SW00437 , Found in Section & Models : Transmission & Rear Axle > Torque Amplifier Parts, Case-IH TRACTOR: SUPER MTA, Case-IH TRACTOR: 400 FARMALL, Case-IH TRACTOR: 450, Case-IH TRACTOR: 560, Case-IH TRACTOR: 660 Associated Items : A-373338R91 Also A-IH-C-MUSCLES, A-IH-O-SUPMTA, A-IH-P-ACCESSORY, A-IH-P-SUPM, A-IH-S-BRAKEREP, A-IH-S-CARBSPEC, A-IH-S-SUPMTAW6, A-IH-S-TUNEUP, A-MAG-S-317, A-SMIH8, A-FRM-IHOL, A-IH-C-MUSCLES, A-IH-O-ELECTRALL, A-IH-O-ROTCUTFH, A-IH-O-400, A-IH-O-400DSL, A-IH-P-ACCESSORY, A-IH-P-HYDTCH, A-IH-P-IMP300, A-IH-P-400 And : Drive gear has 20 Teeth, (Tooth Length = 1.300", Bearing Bore = 2.460"), w/ belt pulley driving gear
(39 Teeth).