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I can see .2 better for 3.55 especially for someone who isn't a professional racer. That margin should go down with knowledge, experience and execution but the 3.55 would still ultimately be quicker. I think the 3.31 vs 3.73 would net a difference of .2 consistently.
 

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If you ever plan to tow anything I would only consider 3.55 or 3.73. With the 3.73 I can tow a 30 ft travel trailer in OD.
 

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Discussion Starter #4
I can see .2 better for 3.55 especially for someone who isn't a professional racer. That margin should go down with knowledge, experience and execution but the 3.55 would still ultimately be quicker. I think the 3.31 vs 3.73 would net a difference of .2 consistently.
Thanks i'm thinking the same thing,the 2011 Truck i had with the 3.55 gears is 2 tenths quicker then the 2013 i have with the 3.31 gears in the same weather conditions.

Later Mark.
 

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I can see .2 better for 3.55 especially for someone who isn't a professional racer. That margin should go down with knowledge, experience and execution but the 3.55 would still ultimately be quicker. I think the 3.31 vs 3.73 would net a difference of .2 consistently.
That last line should have read 3.31 vs 3.73 would net a difference of .2 consistently with a seasoned racer and .3 - .4 with recreational racers.
 
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