I plan on freeway driving so I have the 700R4 in mine with a 373 gear 8.8 rear. A friend of mine has a TH350 in his truck and likes it, most of his driving is short trips. He also has a 3.08 rear. I do have a TH350 that came in my truck when I bought it that anyone can have for free. It supposedly worked fine but I had access to the 700R4 and switched it out. It is a long way to ship one that may or may not work, but if anyone is close and wants it let me know.