well my tranny dosent slip or anything like that, lets say highway driving when i push my foot down to about half or 3/4 throttle itll go go good for a while, i hit a certain speed, or rpm and itll hunt gears like 3 to 4 or vise versa, really violently shakes the whole car around. when im driving about 2500rpms and she shifts from first to second with a slam , someone told me the firmer tha shift the better and not to mess with the tv cable anymore,i had to adjust it cause it was shifting at like 4000rpm out of first no matter who slow you where going so i had to mess with it by feel. all those directions on line are crap anything everybodys ever told me about how to adjust that thing is crap it just dosent work on mine. so what should i do here sound like a clutch problem or the upshift sleeve maybe, how else would i go about adjusting that thing, the gm garage??? does it even sound off its shifts a 2500rpm but just firmly, the shift points seem normal to me just firm