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Old 04-10-2019, 11:23 AM   #19 (permalink)
Master EcoModder
Join Date: Oct 2009
Location: Phoenix AZ
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Automatic 4 speeds with a second Overdrive.

I am thinking that a second overdrive added to a stock 4 speed auto with a OD gear can work and in fact greatly increase a stock car/vanís MPG, just by lowing the cruse RPMS from around 2400 RPMs to 1700 RPMs.

This seems to be the best of all worlds, stock gearing until the added Over Drive is engaged then the advantage of super highway gearing.

Your thoughts and knowledge is invited.

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