MrChuckles

Yeah, I have a 3.8 and I think even after regearing when I get my 37s it will still suck.

jeepmojo

even these you shift very close usually trying to get into 3rd by the time you get to the other side of the traffic light lol I always feel im holding up traffic , but I ignore them every ones in a rush . I cant destroy the motor to satisfy people behind me. They do usually pass me on the first chance they get though. Youl get used to the low gearing after a while . once your in 3rd gear it opens up and 410s are great even on the highway. I like it now and cant imagine driving with the 3.21 gearing like I had in my 2011 jeep, that was awfull " I couldn't get up the hill with 33s had to wave people to pass me lol BUt the 410s are great off road and in 4lo

UnJKlimited

I'd still have to go to at LEAST 4.10's for that kind of dough.

blue_chaser

Another 2012 JKU, 6 spd with 315 Duratracs and 3.73, that thinks it pulls fine. Went with lighter bumpers, syn winch line, etc. Did swap to Rubi TC for offroad, while maintaining gas mileage on the highway. I think people with 3.6's might be over gearing.

mattyk

great thread!!

i wish i came accross this when i was regearing. would have saved me a ton of time. i have an 07 JKUX MAN with 4.56 gears. i love the way it turned out becasue the amount of power on road is perfect and its more then enough offroad to do anything i want. my question is this though

after regearing, my MPG took a huge hit. im only getting roughly 10-11 MPG. i dont run too much extra weight and i cant figure out why im not somewhere at least around the 15MPG range.

current set up that adds weight- skid plates underneath, rock rails, Mickey Thompson MTZ 35's on MT wheels, Metal cloak fender flares.
otherwise- i have a custom bumper that weighs roughly stock, i rarely run my spare. i still run stock rear bumper. dont carry my winch around town unless im roadtripping for wheeling.

all in all i dont feel like its really THAT much added weight. any ideas why im getting such poor milage for my 4.56?

it is a DD 50 mile round highway trip at usually around 65-70 MPH.

UnJKlimited

That seems like a pretty big drop. My gas mileage seemed to improve after going to 4.56. I had 3.21's and was getting 13-14 mpg after the regear I get 17-18. I am running 35" KM2's on a'12.

mattyk

yeah i dont get it either. i live in a flat area at sea level as well. was something just not programmed right?

UnJKlimited

That could be the issue. Did you buy a programmer or did somebody else do it?

mattyk

dealership did it

can anyone think of anything else that could be causing such a hit?

planman

The dealership cannot program for 4.56s because they weren't available stock.

You need to buy a Superchips Flashpaq and do it yourself.