I have a 98 F150, 4.6, 4x4, 3.55 gears NON-LS. I bought the truck about a month ago, the guy i bought it from let it sit for 8 months. ive been driving it for a while and today the rear end of the truck started bouncing when i was driving in town, i never got over 45mph. and it does this when braking too, but stops after i apply harder pressure on the brake pedal.

what could this be?

 

Crosspost.

https://www.f150online.com/forums/ot...g-braking.html

 

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