I have a 08 ford edge sel awd. Has been great till now not sure what the issue is when changing gears i feel a slight bump been happening for about a 1month now. Also when driving or accelerating to a faster speed I get like a jerk or maybe like it's hesitant to speed up more i always feel the huge bump right under the car sometimes constantly for like a week then goes away for a few weeks, also when accelerating my tires feel like there not keep up with the speed like there not rotating properly it feels like bumpy then it'll stop if I slow down then the tires feel normal. I got my spark plugs changed thinking that was the issue with accelerating but it's continuing. I've taken it in to the shop to get diagnostic test/drive it but it didn't happen when they drove it so any suggestions would help greatly or if anyone else is experiencing this. i have about 166,000 miles on it. Ik it's alot.