You can have a tranny mechanic look at it first.

I would do a R&R on the tranny if it ended up being bad since you might find one on the cheap.

What part of S America are you headed? Reason I ask is, they have the Isuzu Caribe down in Venezuela and you could always buy one of those!

http://www.tucarro.com/indices/carro-caribe.html

91 T, 2.8 A/T, Weld Wheels, 33 A/Ts, 3? Calmini lift & stabilizer, OME leafs & shocks, ARB lockers F&R, 5.38s F&R, Superwinch Hubs, full roof rack, brush guard, One Bad rear bumper, Hella fog/driving lights