Vibration is noticable starting a around 45 mph and gets worse as you add speed feels like it is coming from the front of the truck. can find no play in wheel bearings or drive shaft and tires have been rebalanced and rotated. PS vibration is not so bad that you can not drive the truck at 70 mph. At actually feels like a tire is out of balance.
2004 ranger 4x4 with 257000 with a 4.0 v6. has a vibration. on 2004 Ford Ranger
poss tire balance issues or cv joint as mentioned
1 more answer
possible issue with cv joints. do the tires have heavy treads? if so they could have limited speed rating.