Isuzu rodeo automatic transmission

I have acquired an Isuzu Rodeo 2000 4x2 model with a v6 3.2L and it only had 50,000 miles! The day after I got it the Automatic transmission died on me. i had it rebuilt and it only lasted 2 months! My mechanic suggested I go on line and find a new/used one...but have recently read on-line that the best bet is to rebuild and dump it! Is that a real suggestion...I love the car and the ride...need help? Suggestions please