Hello, I have an ’08 F150. It knocks and shakes when backing out of the driveway, stopping at stoplights, driving in parking lots, ect. I’ve already spent $1000 attempting to fix the issue, but it remains. It sounds like i could spend another $3000 and that still might not fix the issue. I’ve decided to trade it in.

I’m hoping to make this issue less noticeable when I attempt to trade it in.

I was told to dump seafoam into the oil, drive no more than 15 miles, change oil with 20w-50, and drive straight to the dealer to trade it in.

I’m looking for input from anyone familiar with this issue. Any tips or advice you might have to help me sell this is appreciated. Thanks in advance!