on my 99 tahoe with the 5.7 vortec V8 the tranny shifts at high rpm when taking off it shifts around 5000 rpm into 2nd gear then drives normal but with a slightly high rpm it also doesnt drive while in reverse it wont move an inch when it is in reverse it sounds like the torque converter just whines kinda like a supercharger but not that loud i changed the filter and fluid but it made no difference has anybody had this problem?