4.11's effect on speedo
02-07-2008, 05:27 PM
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4.11's effect on speedo I just got 4.11's in a new 9 inch and noticed that speedo seems to be off~5mph over..Does that sound about rite?...I tried the search but it wasnt working
02-08-2008, 12:30 AM
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of course it's going to be off 
your speed is measured off of the trans, so when you put lower gears in it, your driveline is turning faster to keep your car at cruise speed. a tune will fix it.
your speed is measured off of the trans, so when you put lower gears in it, your driveline is turning faster to keep your car at cruise speed. a tune will fix it. 
