Just put on a new set of Goodyear tires on my 94 ford trk. At
30 to 40 MPH I get a small bump in tires. Took back to dealer
they re-balanced tires and drove it. Said I might have a drive
line problem. Called a Transmission shop, ask about driveshaft
and they say if it were out of balance it would vibrate all time.
I can take my hands and shake both back tires and I feel some
slack. Don't have this in front. Was wondering if I could have
something possibly loose or maybe bad bearings. No noise, and
no broken springs. Transmission is overdrive, and it bumps in
or out of overdrive and also in newtrel. Any suggestions would
be appreciated..