I had 295/50-15 BFG T/A radials on my car. I never thought they were spinning, the auto trans felt a little mushy on the 1-2 shift and I was thinking I would have to rebuild it sooner rather than later. Car had 3.90 gear rear axle with a locker. 500-550hp 440 with ported heads, solid lifter cam and a really good Coan converter that stalled around 3000.
I was prepping to go to a track event and figured I would put some good tires on it. I bought some 325/50-15 Drag Radials. First time I drove it felt like I was getting shot out of a canon on the launch and the 1-2 shift caused the key cylinder and keys to launch out of the dash and into the back seat.
So, basically I had been driving it for a couple of years hazing the BFG T/A tires without realizing it.