You need to:
1. Recalibrate your jeep
to read the new tires. Without doing so your speedo, odometer, and mpg are all incorrect.
35s paired with an auto tranny pre 3.6 is bad news. You need to regear
. Get a reputable shop to do the work and go with a good quality set like Yukon gears or the like in 5.13 or 5.38.
Don't walk...run away from that dealership
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