bamadiesel..WFO!! - To tell you the truth, I don't really feel a diference in shifts either. If anything, it feels smoother and easier to move out of park into drive. I think this might just be from using transsynd fluid though. I also installed Robs efi live tuning at the same time as the exhaust, downpipe, egr plate and transgo jr kit so I wouldn't be able to single out a smooth shift being robs tuning or the transgo kit itself.
Jd4230 and Shov - I really like the 4" exhust w/ quiet tone and muffler. I had rob tune a rumble at idle and it sounds so much better. In the cab it is very quiet and no noticable drone in town or at freeway speeds (I haven't towed with it yet though). I got the exhaust and downpipe mostly for the decreased egt's while towing and better fuel economy (DPF delete).
P.S. Even with those mising bolts in the valve body things seem to be fine... just makes me nervous ya know.
08 Silverado LT 6.6 Duramax Crewcab
EFI Live by Rob
4" Diamond eye w/ muffler and quiet tone front pipe
Diamond eye down pipe
EGR blocker plate
Edge CTS with exhaust probe
SS tie rod sleeves