Well i am new to the mazda b ranger 4x4 so i know very little of the problems except what ive read via the forums. any ways my problem started the other night after i got up to highway speed i got a very loud growling/grinding sound, kinda felt like a flat tire, but it wasnt a flat obviously, i could feel it in the steering and under my feet in the cab , also if it helps i was turning right onto the highway and got about 40 and it started, lasted till i slowed down below 30 and turned then kept doing it so i stopeed at a friends to check my wheels and tires stayed there for a few hours then i left it did it when i pulled outta the driveway and got around 25 - 30 mph drove a 1/4 mi. then turned left up a slight hill it popped kinda loud and then stopped drove home about 12 mi and never heard it then drove it today to work and it now shakes pretty good at interstate speed 55 + and feels kind of wobbly when i slow down.. any suggestions are greatly appreciated becase this is my only vehicle and i cant afford it to be setting on the side of the road