This is a A-396421R1 Ring Gear, Flywheel PN: 396421R1Main Description As Following : A-396421R1 Ring Gear, Flywheel P.N: 396421R1 Inside Diameter: 12.326"Outside Diameter: 13.456"Teeth: 133 Crossed From: 122028 , Found in Section & Models : Engine Parts > Flywheels and Ring Gears, Case-IH COMBINE: 1682, Case-IH INDUSTRIAL/CONSTRUCTION: 2504 (Gear & Hydro Drive W/ D-188 Engine S/N 13, Case-IH INDUSTRIAL/CONSTRUCTION: 2544 (W/ C-200 Engine), Case-IH INDUSTRIAL/CONSTRUCTION: 3500A (W/ C-200 Engine), Case-IH INDUSTRIAL/CONSTRUCTION: 3514 (Gear & Hydro Drive W/ D-188 Engine S/N 29, Case-IH INDUSTRIAL/CONSTRUCTION: 3514 (W/ Synchromesh Trans. W/ C-175 Engine), Case-IH INDUSTRIAL/CONSTRUCTION: 3514 (W/O Hydra-Shuttle Trans. W/ C-153 Engine, Case-IH INDUSTRIAL/CONSTRUCTION: 8000 (Forklift W/ C-200 Engine), Case-IH TRACTOR: HYDRO 70 (W/ C-291, D-312 Engines), Case-IH TRACTOR: HYDRO 86 (W/ C-291, D-310, D-312 Engines), Case-IH TRACTOR: 504 (Gear & Hydro Drive W/ D-188 Engine S/N 13676->), Case-IH TRACTOR: 544 (W/ C-200 Engine), Case-IH TRACTOR: 656 (Gear & Hydro Drive W/ C-263 Eng. / Hydro Drive W/ D-282 En, Case-IH TRACTOR: 666 (Gear & Hydro Drive W/ C-291 Eng. / Hydro Drive W/ D-312 En, Case-IH TRACTOR: 686 (Gear Drive W/ C-291 Engine) 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-3500APAYL, A-IH-P-ENGD239, A-IH-P-3500ATLB, A-IH-S-ENGD155, A-IH-S-ENG157, A-IH-S-34003500, A-IH-O-3121, A-IH-O-3514WLDR, A-IH-P-ENG-4DSL, A-IH-P-ENG14CYL, A-IH-P-3082 And : Inside Diameter: 12.326" Outside Diameter: 13.456" Teeth: 133