Slightly hijacking this thread I suppose, but it is a similar topic.
I'm trying to decide on a gear ratio, and since I won't be able to test drive each under various conditions (towing, highway cruising, etc.) I am wondering if there is a consensus on which one is best. The most I will pull is 7500 lbs. and I am fine with locking out 10th or 9th if I need to, or if the transmission moves around a bit under that kind of a load, however, when not pulling I would prefer the truck hold in 10th as much as possible on the highway. I rarely go faster than 70, but don't want to have the engine at faster than needed on the highway, either.
Basically would either ratio serve me fine, or if I were to err to one side or the other, which one should it be?
I am leaning towards the 3.55 but I am coming from V8s where the revs were more beneficial.