Originally Posted by 641montecarloSS

Ok so I have had my monte for about 4 years now and i think it was about two years ago when i started realizing my car would Shift really hard every now and then. Now my first thought is that I have a bad electronic cylinoid but i wonder if it may be something else. It doesnt happen all the time, it happens at random times. sometimes it is when i am baby'ing the the hell out of it and each shift is a hard tug. I am more familiar with older non-electronic transmissions and motors. I do not know much about this electrical **** so as far as i know it could be a simple fix or it could be a big one. It has 140,000 miles and is stored away for the winter. I have ran transmission sea-foam in it. but that was just a simple "why not try it." Please feel free to comment and share your opinions with each other cause i have no clue about these transmissions. -not good with this newer technology! Thanks

Originally Posted by Al84