HERE IS A NEW REAR AXLE PINION  SEAL 

THIS IS FOR THE 9 INCH RING GEAR "HEAVY DUTY "AXLE WHICH HAS A  4.125" O.D. 

SOME 9 INCH HAD A SMALLER 3 INCH O.D. 

THIS FITS  :

*****  1957 1958 FORD COUNTRY SEDAN COUNTRY SQUIRE RANCH WAGON THUNDERBIRD

****   1957 1958 1959 1960 MERCURY 

****   1958 EDSEL