I have a 91 XJ with a 4" lift and 32" tires. The XJ is a manual with 278K on it. I am constantly driving over Vail pass/ Loveland pass in Colorado. My XJ will go 65mph up the pass in 3rd gear. I am replacing my jeep with a 1999 or newer XJ, but am switching to an automatic. My question is will I be lacking the power in a 99 or newer automatic to climb at that speed? (There is a 4” with 32” on the new jeep as well) Also read that throttle bodies can add some HP!! Can I get some opinions?