I think what I'm unsure about is when I look at the numbers using simple math, whether its 30 inch tyres or the 3.55 diff, the difference is only about 10 or 12 percent.
Which would increase my speed from 40 mph to about 45. That doesn't seem like much of an improvement given the expense involved.
So I'm wondering am I missing the point. I've read reports of people getting massive improvements and happily driving down the highway at 60 mph. Is there more to it than what the simple math calculation indicates?
I've made no "improvements" at all to my truck and I drive 55 mph all week long for work. Is it as quiet as a new truck? Heck no.
Are you saying that your truck will not exceed 40 mph at all or are you hesitant to push it beyond 40mph?
My truck has the stock 4 blade fan. It doesn't seem exceptionally loud to me, though. I don't own any modern vehicles so driving weird, old, noisy cars seems perfectly normal to me. I drive the '39 Packard 60-70 mph on the freeway. It, too has a 3 spd with a 4.11 rear end. It has about 53 more horsepower than the AD Chevy, though.
