hi I just got a 1980 pace car edition with 39,000 miles everything was working great every light gauge works perfect all oringal I put about 100 miles on the car for some reason now the car will not shift right and the turbo light stays on normal when I floor the car tranny shifts down but wont change gears until I come off the gas alittle very odd thing that the turbo and tranny are acting up together if anyone could please help with this that would be great thank you