James S--Ditto on what Mackey said. Be assured, YOU CAN GET THE ZF6 AND 4X4. Just go to your dealer and order it. As for as mpg, I think most Allison are getting as good as my 6 spd.
<b>Otis Alford --EMAIL-- oalford@bellsouth.net<br />\'02 3500 LS ZF6 spd, LWB, CC, 4X4, Dark Carmine, tan interior; <br />Una-Goose Hitch, with Jordan 2020 Ultima brake controller, <br />(FREE from GM) Commercial H/D Adrian Aluminum tool box,<br />Amsoil 2 Stage Air Filter, Synthetic oil and Gear Lube, Fumoto valve, <br />Husky contoured floor liners, Bed X-tender, Rhino bedliner,<br />Putco SS BOSS cab/bed running boards, Lund SS hood/bug deflector,</b>