my 1973 Pontiac grand prix has hard time shifting through gears when i am hard on the gas & when I give light throttle to medium throttle sometimes it shifts ok. But other times it seems like it doesn't want 2 shift n to the next gear. It is a stock automatic turbo 400 transmission
22, 673 miles on the car
what & were is the vacuum modulator. what does it do
22, 673 miles on the car
what & were is the vacuum modulator. what does it do