Rear Tires Suddenly Lock Up Going 65

Oklacarcollecto said

I would also think rearend and maybe brakes. If it had just been one wheel I would have thought about the strut bar coming out and getting between the shoes and drum.

Click to expand...

I could see maybe rear end but why would brakes all of a sudden lock up without being applied? I still think while manually shifting reverse may have been engaged somehow. Eventually if it happens again something will brake and then it'll be easy to pinpoint.