These units have been completely checked over, all bad parts replaced, forks, chains, bearings, seals, etc, also they have a case saver plate installed to keep the oil pump from rubbing thru the rear case, new output bushing also in the tail housing to keep the rear seal from wearing out too soon. I have other units also like the 246 hd for 3/4 ton trucks, the 263 hd electric shift 3/4 ton, and 261hd manual shift for 3/4 ton, also some of the 263xhd for the 2500hd trucks with allisons all are different prices, please call me at six one six 6 nine 6 3 six 1 nine, ask for Lyle, THANKS! NO TEXT PLEASE, I DON'T RESPOND