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Old 02-27-2016, 10:08 AM   #43
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Originally Posted by Cummins12V98 View Post
Hand calc? Over several tanks? Average of all conditions?
Towing mileage was an average on a 6000 mile trip hand calculated from socal up to Canada and across the rockies.
16 mpg is highway mileage on trips to arizona and nevada. 14 mpg average city driving. At 80 mph I am running 1800 rpm with 373's
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Old 02-27-2016, 07:06 PM   #44
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Originally Posted by cwsqbm View Post
For 68RFE, 5th is 0.816, 6th is 0.625

4.10 x 0.625/0.816 = 3.14 ---> actually a bit steeper than the 3.42.

3.42 x 0.816/0.625 = 4.47 ---> deeper than 4.10 or 3.73.

For AS69RC, 5th is 0.77, 6th is 0.63
4.10 x 0.63/0.77 = 3.4 ----> effectively same as 3.42
Thanks.

That is how I decided that 3.73's are really not worth having.

3.42's with Aisin is an awesome combo. Above 27k just skip to 4.10's with Aisin.
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