The gear kit from Patrick's will only work in 1/2 tons. With the 3/4 and 1 ton stock rear, the 4.10 from the '68-'72 3/4 is the highest gear you'll find. Otherwise, a complete rear swap is in order for anything higher. A good source for a 3.55 gear would be to check under Dodge or Ford vans. That gear in a Dana 60 housing is very common, and the overall width is just right for an AD truck. Be aware, though, that many of these are semi float, rather than full float like the originals.


Bill Burmeister