I just had my Mike L stage 4 kit put in and I am sick first of all Hawaii no one knows how to build a Allison I waited for almost 2 months to get the kit installed then it took 8 days to get my truck back and at first I thought it needed to relearn so I took half a day off to drive like 200 miles to do the relearn well in the end I am at the breaking point my friends 7.3 gave me action on stock parts no way I would blow his doors off now with built parts he is right with me.Shift hard in gear but drives ok I feel each shift and feels like I am in tow haul at all times I have to keep a steady push on throttle pedal and right when I let off she starts slowing down not fast but I dont know what to think Ive owned a bunch of Dmax's and I always loved and am proud owner but if I cant get to the next level I am really thinking of giveing up I am one of very few Hawaii Duramax owner's that when I can afford to build or ad parts I do but this kind of stuff I dont know what to do the person was supposed to work with Mike or dont touch it I told him point blank cause if he listen I would not be haveing these problems.....Thank you Mike L for all the phone support and help. Well back to the shop on tuesday I hope thay can make it right and listen to Mike