[cribbs74]

Preferable? Can't really say. More Fun? Yes! Seriously though I think there is an RPM calculator out there somewhere that you can figure out what your RPM at different cruise speeds, based on things like tire size, trans final drive ratio and rear end ratio.

 

[cribbs74]

3:55 might be better with the bigger tires. What are you planning on doing with this truck? The reason I ask is those are hefty tires for a 2WD. Other than looking good they won't offer much in the way of fuel economy. I assume you don't plan on doing much off road with a 2WD? Just asking not judging..................

 

[cribbs74]

Well, I have a stock 318 with a 833 OD and a 3.23 rear with stock 15 inch wheels. It pulls well but not anything spectacular. The 1 st gear in the 833 is low so it winds out pretty quick. With a 3:55 you would be working the gearbox, but second gear is tall so it may equal out. So, problems? No, but I have toyed with the idea about a 3:55 for myself. Keep in mind my 318 is stock and the only mods are a true dual exhaust, plus my engine has 163,000 miles on it. Your engine is probably much stronger.