Stop in for a cup of coffee

Ben Drinkin said

I agree (with an automatic). With a 4 speed, I'd opt for 3.73/3.91...

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True, but with either an auto or manual, the final gear ratio out of the tranny is still 1:1 so Highway Speed and performance will be equally affected. The 3.55 just provides a better RPM at highway speed for long hauls.