jeepwave

I know there are a billion threads on here but I figured that every set up is different and that the best answer I can get is by providing the best info I have.

So can someone help a newbie out with what gears to buy?

My set up:
3.5" Aev lift on a 200JKU X
35X12.5X17 rims

I was thinking of going 4.88 but a local shop suggested 5.13
I don't want to end up over-gearing and thought I'd ask what everyone thought before I jumped into things...

Thanks guys!

medbender

what year. you have 200jku

jeepwave

Sorry..iPhone is finicky...

2009

medbender

you'll get the best performance with 5.13s and be sure to get a tunner like a procal to set your shift points and speedometer

jeepwave

I've got a superchips flashpaq so I'm ready to go for that but I guess one vote or 4.88 and one for 5.13 so far

aldaman

I personally would pick 5.13s. If you look at the chart there is not much difference in RPM between the two (just a few hundreds). Because of the majority that will agree with how underpowered the 3.8 engine is (no disrespect intended, I used to own a 3.8 JK) the 5.13 will give it that added kick...

sodapop

In a nutshell...

My brother got 4:88's same Jeep as you, did improve hugely from 3:73 stock but still doesn't hold OD under 75-80. I don't like it; sluggish.

I just went 5:38's and love it. Would have been curious to drive one with the 5:13's but I kinda flipped a coin.

Both Jeeps are on 35's but I chose the 5:38's cuz I have bumpers, winch, Gobi rack etc...,

I have a strong vote for NOT going 4:88.

Superchips shift point adjuster is a joke. I tinkered with them many times and they never came out to be what I set them to. I am happy with the Superchips preset shift points on the 87 and 91 program though.

Hope this helps!

Feasterdef

Just got 5.13s installed. 6 speed manual. 35s. I love it! Would recommend.

DvsKin

6 speed manual here. I went with 4.88's and they seemed overkill at first, to the point where I almost sold my 35's for 37's. I couldnt even imagine going with 5.13's. Take it from some who spent the $$ already, you seriously may want to check out 4.56's. I wish I did them, but eventually learned to like my 4.88's

Hgwy MPG tops out at 16.3mpg 65mph @2600 rpm or so (6th gear)

Firelyle

I've got the auto & 35's with 5.13's and I think it's great. With the D30 axle there is also a lot of talk of the ring and pinions being too small and prone to breakage....don't have any first hand experience with that but something to consider.