Rear Axle code "AF" was used from 1955 thru 1959...3.90 ratio, 3100 & 3200 Light Trucks.

The date code "1 21" = January 21st, the year is not stamped, only month and day.

Mike B smile


Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
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Silver Spring, MD