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Old 02-02-2012, 03:11 PM   #2
Keith Seymore
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Join Date: May 2009
Location: Motor City
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Re: 2:73 ratio in my new Blazer??

The powertrain chart in the GM Heritage Center archive shows the 2.73 axle as base (special order not required).

http://www.gmheritagecenter.com/gm-h...let-Blazer.pdf

see page 2 and page 6.

Engine RPM at a particular vehicle speed is calculated as follows:

N/V = [Tire Rev (rev/mi) x Axle Ratio x Trans Ratio] / 60 x V (mph)

N = engine rpm
V = vehicle speed
Tire revs is in rev/mi
Trans ratio would be "1" for high gear


K
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Last edited by Keith Seymore; 02-02-2012 at 03:27 PM.
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