Quote:
Originally Posted by bird7263
So, I did a little work this week. Found out my truck had 3.73's with an eaton posi. I thought it had 3.55's but I miscalculated. Also remember I am running a muncie 4 speed. So I am driving about 50 miles round trip for work. I am using the 66 as my DD. I was spinning 62 miles per hour at 3000 rpm. You can imagine my gas. $25 a day or so. So,,,,, I swapped in open rear end with 3.08's.. MUCH BETTER. Now I am doing about 65 at 2400 rpm. Talk about a life saver!!! Just not a fast out of the hole any more.
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I've got a 3.08-12 bolt sittin in the garage, waitin to be swapped with the 3.73. Lookin forward to a little gas relief.