The trans-go kit is part of the Suncoast kit that I have in my transmission. You do have to take the trans out and disasemble part of it to put the trans-go kit in the pre 06 trucks as you have to drill and put restrictor valves in the C-2 clutch drum. While you are in there this far you might as well replace damaged clutches and upgrade your TC as well. There is a few more things coming soon that everyone should consider as they help clutches live longer, but I am sworn to secrecy!