Like the title says, my 07 pathfinder feels unstable at 70 mph. Just bouncy and weird, but its hard to describe. I daily drive it, and something recently just started feeling different. It has 90k miles and all I've ever done is fluids, brakes and a radiator. The suspension is original.
My question is: Is there anything a shadetree mechanic can diagnose and fix, or is this a job for professionals? I have good a mechanic that I trust. But he's not cheap, and I'm really cheap. Advice appreciated.