4:88s or 5:13s ??????
12-16-2008, 08:34 AM
#21
JK Newbie
Join Date: Oct 2008
Location: Richmond, VA
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Your best best is to buy the Hypertech Econ Max Power programmer. This will not only adjust your speedo to where it should be for the tires but it will also set your auto shift points to where they should be for the gearing. Dealership cant do that. Need an external ECU or programmable computer to do it for you
