rev limiter on auto LS?

i now it's a teg problem, but this forum might be more insightful...
i recently put a rev hard stage 2 on my 01 auto teg ls, slapped the sucker on the dyno and it just would not rev above 6k rmp(on the dot) when in D4...when in d3 or d2 it'll rev way above 6k just fine, but it won't on d4. the guys running the test couldn't figure out the problem...has anyone here ever had or heard of such problem? thanx ya'll.

/d

edit: got 155 whp and 129.54 lb torque @ 5psi w/ everything else stock, if anyone is wondering.

how fast were you going ? cars also have speed limiters. maybe you reached the speed limiter

also why are you going that fast on a dyno.

was only at 85'ish. i've gone over 100 in it before, just not that high rev.

edit: i don' tknow why the tester was going that fast on the dyno.