I did some minor searching and cam up with nothing. What is the rpm's that the drive shaft would turn around highway speeds? I don't need anything exact just a range would be good. I am pondering a hydrostatic drive system for a truck. It seams in my mind that it would be possible. Probaly not the most cost effective thing in the world but the upsides to it would make it awsome. Eliminate the tranny, tcase, and drive shafts. I know there are hydralic motors out there that would be able to transmit all the power you would need at the axel but I am not sure weather or not they would run at the appropriate speed. I duno, just some thoughts and ponderings. Probaly wouldn't be feasable. What is everyone elses thought on the idea?