I'll be useing 373 gears, starting off with 35" tires, but will have 37". Transmission is a TH-350, Now I'm thinking befor I move up to the 37"ers, that I'll want a "Doubler". My question is, will a TH-350 survive 37" tires / 373 gears with normal street driving, and some interstate trips ??? I would think the "Doubler" will do the trick off road, but what about in normal mode for to and from the trails ???