I have a tranny problem. My Blazer is an 83 4x4 with the 700r4, It will pull fine thru fist shift to second pull fine, then Bam back to first gear. Ive put a new kick down cable on it, no luck. This truck has an wiring issue and i was wodering if the green and yellow wire plugged into the side of the transmission controls the shifts or just the converter lock up. I know absolutly nothing about a tranny, Throw a engine at me any day of the week no prob, but not a tranny.