i´ve got an 2008 auto sahara unlimited with 2.52 BB and im getting 33 tires, wich one will help the most my milege 4:88 gears or a superchip

 

For mileage the superchip and a light right foot. For overall driveability, gears.

 

x2 - try the SUperchips first, you may have to use the 91 tune to notice more than just the shift points adjustment.

Gears get you back in the powerband for all around driving.

 

Somebody correct me if I'm wrong...

The Sahara 18" wheel/tire package from the factory is HEAVY. Like, almost 75 lbs. per corner heavy. And, they are 32" tires.

So, simply moving to a 33" from this combo. would not really affect mileage and/or power that much since he's already running a heavy package.

It's different for the Sport guys who are going from 29" tires to 33" tires, and from a 52 lb. package to a 80 lb. package. But for a Sahara guy, you're miserable when it leaves the assembly line so you really have nothing to lose.

Moral of the story... you might be happy without gears OR a tuner. Just drive it for a while and see what you think.

 

Yes the bigger the wheels the heavier total weight. If you do a "c" rated tire and aluminum 15\16 wheel there won't be a huge weight penalty. My 33x12R15 tires and wheels weigh 71 lbs.

 

I bought my jeep rebuilt. I think it had the 29 in tires when it was wrecked because When I purchased the jeep it had the factory moabs and 32s and the spedo was off like 5 mph and after i put the 33's on it was maybe 6. Would a superchips, bullydog gt, or just a plain ol procal do the trick. I figure the shift points are off pretty good and maybe i might pick up some better mpg? Any thoughts....

 

I just got the superchip and it helped me with my gas mileage but I just have the moab take offs. For 250-300 depending if you get it used or not. I would definitely go that route before dropping a good 1000-1500 on gears. Plus if you go the other route many people on here would take the superchip off your hands.

 

get the tires first and see how it does. you only want to regear once, and 4.88's will give you too many revs with 33's to make a difference in your mileage.