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Old 03-13-2014, 03:01 PM   #24
SCOTI
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Location: DALLAS,TX
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Re: Project "Haulin Crap" 1986 CC dually.

Quote:
Originally Posted by Chevy3+3 View Post
Okay no biggie. I was just curious. I have the 454/Th400 setup in my truck with 4:10 axle ratio. My rpm's are about 2500-2600 when going about 55-57mph with 235/85/16 tires. I just wondered how much the OD unit lowered RPMs since the truck was similar to mine.
2500 x 22% = 550 or est 1,950rpm
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