Alright so here is the deal. I purhcased a VA smart box E with the big tune 150/200+/0. I babied it for a hundred mile or so when i hooked it up. I've been driving around with it for a while now and have noticed that when i get on it hard( i know I shouldn't with a stock trans) it will hit the rev limiter and refuses to shift. A few times, when in two wheel drive, I noticed that it was just my tires spinning, well i should say tire. Anyway the other night a guy rolled up in an LBZ with an edge. He was dumpin smoke so i decided to try to run with him. We hit a light and not wanting to spin my tires I slipped it into 4 Wheel. I didn't want to launch hard because i remembered that i had a stock tranny and no transfercase brace. I launched at 1800,if you could call it a launch. Well there wasn't much boost at that rpm so it lagged, then shfited to 2nd, took off, and then it hit the rev limiter and wouldn't shift. I doubt that i was spinning my tires even though it was 24 degrees F out. It will shift if i let off but thats it. The only codes that my truck has thrown since i've had it is a change engine oil something or other, tech forgot to reset it, and a U1000 which some electrical code that occasionally pops up bu tno one can fix. Sorry for the long post. Any ideas? Is it slipping bad without throwing a code?