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I too have a new 2021 Rubicon, I drove it for 1,000 and did the 2" mopar lift, 37" tires, and saw a drop in performance especially in the mountains (Breckenridge - 10,000'). I had the gears redone to 5:13 and the power came back. I also changed out the exhaust which I believe made a little...

Ooooops. Definitely won’t slip on the Jeep car vernacular again. Haha. Thanks for the comments, education and support. I have the 3.6L. On i70 heading towards the tunnel I have to down gear to third. Defiant was an issue before regearing and significantly better now but wondering what else I...

Hi everyone first post!!! Just moved to the Boulder area earlier in the year and just took delivery of a 21 Rubicon JL. 4dr, manual transmission. Already had a mopar 2” lift, 37” tires, regeared to 5.13, Borla ATAK Axle-Back Exhaust with Ceramic Black Tips…. Love the car. My question is I...