Ive heard of AT boil over happening when towing heavy loads up hill, and my friend Pedro experienced it once traveling at high speeds with the tires aired down. but I've never heard of the trans simply stopping....I would check condition of fluid and change it out just for good measure.

99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..