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I am not sure how you tune out the bog issue. from what I have read the 17+ zl1 m6 has a 2.29 first gear. compared to the older tr6060 having the 2.66 first gear. I just dont get how you "tune" out a mechanical issue. if this data is correct (it is internet knowledge I found) then your options are to change your final drive gear or pull the trans to see if RPM transmission (or like vendor) can swap it out for a better first gear ratio.
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