Originally Posted by Smoken_joe
Thanks for the info I'm not sure I will get the pro cal my GPS is telling me that the speedo is not really off. I'll have to run some more tests. I will post some pics for you it turned out great I'm very happy. I got Duratracs 275 70 18 and the Jeep sits nice however and I knew this going in that the tire will rub the sway bar if you do nothing. I took a chance and got the tires first and they did rub so I got the Teraflex leveling kit it's only 158.99. The Tires no longer rub and Jeep sits nice and looks great. The kit was very easy to install if you have a floor jack and some jack stands.
Based on the specs listed on tirerack for the duratracs, you should actually be going 63.5 mph at an indicated 60 mph. Of course this would assume that the speedometer was dead on with the factory size tires. Truth is, it is not abnormal for a factory speedometer setting to indicate 1 to 2 mph faster than actual speed. Keep in mind, the faster you drive, the more the speedo is off. At an indicated 100 mph, you would be actually traveling closer to 106 mph