Order aftermarket one. Factory one does not have support struts to keep in folded up position. Its a real pain when hauling something and it wont hold the cover up. I've seen a couple of ones that have struts, rugged ridge and gator I think.
As for the trans tune, they recommend it and told me that it will firm up shifts, holding longer is just the fact that it more HP. It doesnt hunt all the time like it did and increased throttle response so I could get rid of the afe scorcher and sprint throttle booster. They didn't even know...
I did the ECM unlock, e-85/93 tune and trans tune. Unbelievable how much better the truck runs. I have 35's on my mojave and thought the truck was a total pig. So I got an exhaust, sounded better no help. I got an air box, sounded better no help. I got a afe scorcher, a little throttle...