aw4 gurus advice please

Long story really short

89 4.0, aw4, 242

T case stuck in 4low

Drove 60-75 miles like this at 35 mph 3k rpms.

Stopped to check fluids etc, tranny stuck in drive linkage was good and everything looked right from the outside.

Ten miles later tranny goes and spins like a burnt clutch. Leaving me with 5 mph as a top speed.

Could this be because of a fluid leak or or too high of temps from running low gears for too long?

How do I know if its a goner, anything I can check?

xX, sorry to hear about that; sounds like it's toast to me.

When it wouldn't shift out of 4 lo, did you try backing up and yanking the lever?

I'd scour the wrecking yards for a replacement trans and x-case, cause two hours of (I presume) highway pavement driving in 4 lo has pretty well destroyed it.....