Part Number: 12-9940 Application: 1977-1984 FL1977-1984 FX1984-1989 FXST1979-1989 FLT1982-1989 FXR1986-1989 FLST Details:Pinion shaft gear is red size. Red gear size is 1.4737- 1.4729 . UOM: EA Country of Origin: USA