1948 - Similar to Late 1947. Three speed transmission now uses column shift linkage. Serial #'s, FP 1/2 ton, FR 3/4 ton, FS 1 ton, etc... Early 49 - Similar to earlier trucks, except gas tank is now located behind seat inside of cab. Serial #'s, GP 1/2 ton, GR 3/4 ton, GS 1 ton, etc...