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Old 08-05-2013, 09:48 AM
roo roo is offline
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Join Date: Dec 2011
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roo is on a distinguished road

My guess for the trap speed difference would be staying away from 4th gear on a 12 or 13 RAM. This might be done by using 3rd on a 12 or 13 or 2nd prime on an earlier model and avoiding 3rd, depending on rear end ratio of course.
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