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ProCal Needed??

973 views 5 replies 4 participants last post by  kik 
#1 ·
I was told i needed a Aev Procal by a friend.. I have a 2014 JKU , with 285/65/18 Trail Grapplers , measured 32.0 actual... So i downloaded the Speed Box speedometer app, got on the highway... The digital speedo on dash, nav speedo , app speedo all matched.. Was driving 60mph , they all matched , and at different speeds also.... This still needed?
 
#3 ·
I mean thats the main reason people get one i thought , with gear change or speedo is off. I wasnt gonna spend $160 for the daytime running lights...
 
#5 · (Edited)
Well, it does more than simply adjust the speedo; it will also recalibrate the shift points in the automatic transmission, activate DRLs, and a bunch of other things.

But it seems like you haven't changed the diameter of your tires, so you don't need to worry.
 
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