With a vehicle as short as a Jeep, locking the rear wheels will cause it to go snaky like a bike does, but you can't lean out of it. A bike also has the gyroscope effect big time with at least the front wheel still.
A longer vehicle will also act the same, but it is a bit more forgiving so you can maybe hold it straight with the steering wheel.
Once it breaks free, not many people can hold the vehicle straight.
Locked up the rear tires slide way faster than the free turning front ones.
We used to do this on purpose when racing on ice roads or frozen lakes to help get around corners faster.
In part time 4x4 when you lock up the brakes, all 4 wheels lock for the reasons you think.
This just up and slides you sideways into the ditch or straight off the corner.
This action is a fast 'low side finder' like a locker on ice and is one reason I think you see so many SUV's calmly sitting sideways in the ditches during snow storms.
I always highly recommend folks new to 4x4 hit an empty parking lot and try it out come first snow. The braking action in 4x4 is like nothing else you have ever driven.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT'sTim Hayes wrote: