i have an Delta 88 with an Olds 350/Th350 and I have the same problem. I am NOT a mechanic. but I would like to know how to change this problem. My transmission will not shift out of FIRST gear until 50 mph and between 35-49 I get hardly ANY acceleration. All i hear is the flowmasters (gotta love the roar!) but as soon as I hit 50, it kicks in and I'm flying again. Can anyone help me?
after reading the first post again, I have the exact opposite problem, but I still need help