Quote:
Originally Posted by gchemist
I run a '77 12 bolt in my truck. Gears are 3.08's. High gears but tires are on the small side. Towing definatly sucks with any amount of good weight. I can't complain of 18.5 MPG at 70!!
You will not find 3.42 in a 12 bolt. You'll have to add them. Common gears are 3.08s or 3.73 gears.
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what transmission are you running? I have a 10 bolt with 3.08's and i'll be running a TH400... what are your rpm's at 70mph?