drive train failure??

My wife's '98 Amigo, has had problems with the 4-wheel drive staying on and not releasing properly. Now this has only been a momentary problem because it will eventually start working again.
The problem now is, as she was driving home from work in a snow storm with the 4-wheel drive on, she also had the cruise on and going about 50 mph. All of a sudden she had no power to the drive-train, and the motor revved up high, because of the cruise being set. The 4-wheel drive wouldn't kick on or off, nor could the car be driven anywhere. The drive-lines are in-tact, everything seems normal, except that we can't drive it anywhere. Is this an electrical problem, or what. Please, if anyone knows what the problem is let me know. I really need to get this fixed, and hopefully without taking it to a dealer. Thanks, ruckus1

you may have better luck getting answers by posting in the Rodeo forum.

I know you have a 5-speed tranny since that is all that was offered in 98.

I could be the clutch slave cylinder.

Also if you can drive 50MPH. 4x4 isn't going to matter at that speed.

Would the clutch slave cylinder failure, actually stop all power to the axles?
Especially since she was cruising at 50 for about 30 miles before this happened?