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I never owned an 07-11. However I put 35 MTR/Ks on my 12, with 3:73 and the auto, I have corrected the tire size with the AEV Procal. Drove 258 miles round trip going from elevation changes ranging from 400 to 5100 feet with lots of foothills on the both sides, and pulled off 19 miles to the gallon. This included in town driving, rural highway, and freeways.

I don't know if the 07-11 jk would have the same result but my 06 that had the automatic that the 07-11 shared with 3:73 gears and 33s wouldn't come close to that mileage in the same trip. And nowhere near the power range. I know there are differences between the 4.0 and the 3.8, but they shared the same turd that was the 42rle.
 
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