Hey guys I have done the most research I can before posting. My car was shifting hard but after I did the 3x3 drain and fill it shift alot smoother. This weekend Im gonna clean the solenoids. NOW after I drive around for 10 to 15 min over 40 mph, the car would suddenly jerk really hard then go normal then jerk again. scared the crap out of me. anyone experience this and how to fix it. Thanks alot for all your help!

 

Seems like your tranny is failing. When you changed the tranny fluid, how did the drained fluid look like ? Dark with metal filings, or clean looking ?

 

yeah it was a dark redish brown and the drain plug picked up alot of metal.

 

Tranny is slipping and dying. Time for a new one.