Hi there, new to the site, I am looking to purchase a 1998 2500 6.5, but the only problem is the gentleman is saying he cant get it to shift into drive or reverse, so I`m wondering if I purchase a new transmission what all will need to be done to replace it and how many days or hours will I be looking at, and how hard it is, if anyone could help me out and give me some info that would be great.