[mikep]

I'm not sure if there is a company that made an adaptor of any sorts but the way full floating 3/4 ton axles work is that you have a stub shaft that goes out to a hub with its own bearings . The stub shaft can break or not even be there if its a positraction and the other side will still drive the truck. Or if the axle does break its a simple matter of unbolting the axle and changing the axle, In most cases you wouldnt even need to pull the wheel. Arent they great? Having said that ... Its not that big of a deal to convert 3/4 ton axles to 5 lug. It costs money but not a lot. $500-$600 or so. Not the end of the world. The flanges on the ends of the tubes get cut off and new flanges get welded on . Then custom made semifloater axles get installed . Curre makes them , dutchman makes them as do a dozen or so other companies. Ive had 5 lug axles made for Dana 60's and had the tube ends welded at Dutchman in Portland Oregon and the total cost was $550 which included parts and labor. Add to that the cost of the 4.10 geared 3/4 ton positraction dana 60 of $50 in the local paper and I had a complete 5 lug 4.10 geared dana 60 with bulletproof axles for $600. This rear end went under a 69 camaro but the same concept holds true if you are doing it for a truck.