another question, the axle I bought the guy couldn't find one of the axles so he through in another axle but it is a 1/2 ton, am i right in thinking that the 1/2 ton and 3/4 axles are the same? Also I have 4.10 gears from a 85 diff and the 3/4 ton diff I have is a 81 there shouldn't be a problem swaping them in correct?