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This has probably been asked before, but I have recently changed out my 3.73 for 4.10's and it pulls like a motherf**ker!!! I love it! But it messed up my speedometer calibration. Anyone know how to recalibrate?? Please help..............:(
 

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I don't know if you tried yet but i would do a search in the modular forum for speedometer calibrations or just post about your issue. I know this issue has been covered numorous times there (probably so much no one will respond) It seems to me for those years that there may be a gear you can buy that solves the problem (that was how I got out of a ticket with my old 90' 5.0 - with a plastic speedometer gear to make it read off). If not there is another way I just don't know it off the top of my head. Also seems that there was/is some ads in the MM&FF for speedometer calibration stuff - get one of those and look it over carefully. - B P.S. sorry for not helping at all.
 
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