I bought my truck with 130k and it seemed like it had been unmodified. I just got a juice/attitude and was warned about running it in 4th and 5th position because of the tranny. But I've tried it and the sucker won't slip or backdown. I've hammered the crap out of it and it hasn't limped or registered any backdown on the attitude display. Has the Ally been modified? How can I tell? Or am I just lucky? I have it set to defuel on 4 and 5, and honestly have tried it without, and no slippage! What do you guys think?