I had the same issue with some well used BFGs. I had a belt separating, but did not cause a bubble. It went fine straight, but in a slow turn you could hear it squeaking and the front end would shift. Sounded like a cheap pair of sneakers. I put it on the rear and it solved the problem with the steering until it finally got bad enough I had to replace a pair of tires. You might try rotating your tires and see if it helps.