mmonnier

So i lifted my 2009 jk. I put a 4inch lift on it with 35inch tires. It is still running the stock gearing and i would like the car to stay in higher gears. I will be going at a constant speed and it will just randomly drop a gear. I was told that the superchip would make a big difference with how the car shifts. Im kinda sick of getting 12 mpg. Any help would be awesome. Thanks!

jimk403

Flashpaq won't fix that, nor will any other tuner. Only thing that will is re-gearing.

f3arn0FJ

Any good tuner will help a ton. Just have to find the right one for your needs. They should all be able to fix your speedo too, cause that should be off a few MPHs with the bigger tires.

Although very costly a re-gearing will bring you back up to speed and MPGs too.

adicus8

A superchip will help you by giving a bit more power and mpgs. Like the other person said you probably need to fix your speedometer too. If you havent fixed your speedo, you wont be able to calculate your mpgs correctly. But with 35s you will probably need the regear

Ryan0260

Actually the advanced transmission tuning capability will help with that. First off calibrating the speedometer will help some, but the advanced tranny tune option allows you to not only change the shift points, but also how the torque is applied. No, this isn't a substitute for re-gearing but yes it will help with the problem. I am currently testing out my Superchips Vivid for this reason