Car is an '85 Iroc, AT, 305 TPI. The problem is when I'm driving along and the car's in high gear and I start going up a hill or putting the car under load, it just starts shaking and stumbling. The RPMs never change, so I assume it's a tranny thing. You can get past it if you give it a bit of throttle, but it just isn't a smooth ride and it's getting annoying. Would this have anything to do with the TV cable I've been reading about? Totally tranny ignorant. Thanks for any help.