Originally posted by DarkOne
The 3.55 ring gear is geometrically stronger than the 3.94 ring gear. The swap is primarily for high-HP cars, as the taller gears actually help in loading up the motor (more boost sooner) and they also help get it to the ground (taller gears make the car less liable to rip tire all the time). On a bolted NA or low-boost car, i wouldn't do it.

Ok, thanks for the info and the advice. I have been having trouble finding any good info and advice. I actually just purchased a used NV-T350 on ebay, it is the standard GS model. I was looking into putting the taller 5th gear(0.72) into the tranny, but keeping the final drive at 3.94. The 96-99 DOHC(Non-ACR&RT) Neons came with a 3.94 trannny with a 0.72 5th gear. I think the taller 5th gear would really be nice for cruising down highway. Can you let me know if you know of anyone doing this swap.

Thanks,

Andy