i have a 91 chev 2wd reg cab short box truck with a 350 v8 and a 700 r4 auto tranny, now i have had major repairs done to it except for the tranny.....and i am still haveing problems. when i put it in any forward gear and hit the gas it will start reving then just drop off and if i stay on it it will keep on stuttering like that but yet in reverse or park or neutral it will rev just fine, on my last round with it trying to figure it out i tried goin down hill and when i pinned it it kept on stuttering even down hill but it obviously rev higher cause i was heading down hill then trying to go back up it just wouldnt go unless i turned around and went reverse, it was even stalling out...can anyone help me? does it need new tranny? or is it as simple as that stupid throttle valve i have been hearing about more and more..????anyone lol help i have been want to drive my truck for months and months but it is broken