Hello,
My 1995 Pontiac Grand AM GT seems to shutter when I drive between 55 and 60. The shuttering is not at a constant rate and happens at 2-3 second intervals. It feels like the car is trying to switch gears, but the tac reads constant. It only happens during this one speed range -- slower or faster stops the jerking. Neither mechanic I have taken it to seems to know the problem. If you have any ideas, I would greatly appreciate hearing them.
Thank you, Scott