Take your time and be extremely careful who you leave your truck with. At this point, I could write a book on "horror stories with tranny shops"
If your mechanically inclined, I'd order GSMikies tape, get a rebuild kit and get after it.
J-truck thing summed it up best. If you want it done right...................
79 J-10 "Peso"
He is your friend, your partner, your defender, your dog. Faithful and true to the last beat of his heart. You owe it to him to be worthy of such devotion.