Hey everyone! Picked up a used 2007 JK Sahara Unlimited last week and boy do I love it! It's got (I believe) a Rough Country 6" X-Series lift. I just put new 35" BFG KM2s on her as well. Few questions if I may from you experienced JK guys/gals!
MPG / Performance
I've been reading a lot of posts about the Superchips Flashpaq etc. on improving performance and mpg. Below is what my JK is running with and without OD.
70mph @ 2850rpm in 4th gear
70mph @ 2000rpm in 3rd gear (downshifts constantly)
I've read A LOT of people have problems with the tranny shifting up and down all the time when hitting the slightest of inclines with OD ON and I'm having the same issue. So I tried turning OD OFF and you can see what my RPMs are above. It's more more stable and I don't get the constant up and down shifting, but I need to know am I running too high rpm to be getting decent milage, or is that a god range? Do you know what gearing I might have? I'm thinking it's 4.10 but feel it might not be stock.
I don't think I'm getting the correct odometer/mpg readings either because of the 35" tires, I don't think the original owner get it re-calibrated but I can't tell....
Rough Country Lift
I think I have the 4" or 6" X-Series lift but really am not sure and there's no information from the dealer on any of the aftermarket stuff. Can anyone tell by the pics if it's the X-Series or regular? This lift is pretty gigantic so I'm wondering if I can adjust it if it's the X.
Anyway, thanks in advance for any help! Just trying to figure out more about what I have hear. I love this beast. Just need to get it tuned to run better.