10 speed with a 3.70 or 3.90?
08-25-2018, (Subject: 10 speed with a 3.70 or 3.90? ) 
Post: #14
RE: 10 speed with a 3.70 or 3.90?
That's not all that great for fuel mileage and longevity of an ISX. I have a 10 speed with 3.55's and it's "all right" keeping my RPM's at a respectable level while in 10th... about 1300 @ 60mph. With 3.42's you'll probably find yourself driving in 9th a lot or being forced to drive faster to get the RPM's up and burn more fuel in 10th.
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RE: 10 speed with a 3.70 or 3.90? - Chamberpains - 08-25-2018



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