I drive between 6,000 and 12,000 feet all the time with no issues on speed, acceleration or power. Uphill climbing at 70 mph is no issue and mountain passes at speed are a breeze.
You have a 2 door with 6 speed and likely not at altitude so you need to push the skinny pedal more and shift higher and you'll be fine.
Colorado Mountains = Land of Mountain Trails
And now these three remain: faith, hope and love. But the greatest of these is love. 1 Corinthians 13
'08 JK Sahara, Jeep Green, BFG MT's, Pro Comp 4" Lift, Smittybuilt XRC8 Winch, Olympic BOA front & Olympic Defender rear bumpers, Olympic A/T Slider Rails, Spidertrax Spacers, SeatGlover Seat Covers, Bestop TrekTop, Husky Mats, Midland 75-822 CB, Magellan Maestro 3250.