I had something odd occur with the 54 today. As I was pulling it out of the garage, the left rear wheel locked up...acted like the brake was stuck. The car went into reverse just fine and back OK, but once again, when in a forward gear, it locked. I raised the rear end and rotated everything by hand and it locked up again. It feels like something in the axle is slipping and binding. Any thoughts? I know it's not the brakes as I removed the shoes, put the drum/wheel back on and it did the same thing. Obviously, I'm now leery of driving the thing...