I'm looking at getting a rubi front with stock 4.10 and thinking about just putting that in the rear too. I have 35x12.5 15 bfg at. So question is those of you with a stock rubi and 35s how is the ride? Also does the superchips or sprint booster help the delayed throttle and can they fix the speedo? Do they void the factory warranty?

 

As far as the 4:10s and 35's. I ran this for a year it it wasn't bad. I did not have the Superchips. I ran many trails and traveled many miles before I regeared and purchased 37's. If you live around the flatlands you will be good to go, if you live in the hills it will be sluggish but for me it was okay.

With the whole warranty thing, who knows for sure. Some dealerships may or may not honor some types of warranty work.

Edit: I see now your in Susanville, so your in the mountains. BTW if you have 4:10 in the front you will need to put them in the rear at the same time as well.

 

If you are going to regear one end, why not just bite the bullet and do both? 4.56 and 4.88 are popular with 35's, and some of you 6spd guys even like 5.13's. Plug the numbers into the rpm chart and see what you think. (just an opinion, but you will decide to regear higher (numerically) later on, so paying for the 4.10's in one end now will be wasted money).

 

I am running 4.10s now. I just installed some 35s. If you live in an area with a lot of hills I can tell you that your JK will be shifting down a lot. I am having this issue right now. That in itself is killing my gas mileage. To prevent the shifting down I drive with my overdrive off but keep my speed at 65mph on the highway. I can only speak for my own situation but the constant downshifting in strong winds and hills bothers the crap out of me. I will be regearing in the next couple weeks.

And I noticed you are running BFG A/Ts. That is the same tire I am running so we have a very similiar set up.

I would regear both since you have to do one of them anyway. And I would not go with 4.10

 

Just got rid of my 4.10s. I have 35s. I'm manual and went to 5.13s planning for future 37s. Right now I love the 5.13s with the 35s.

 

Dont forget that you HAVE to do both ends, if you ever plan on engaging 4wd. I have 4.10s on 35s, though i would recommend 4.88s if you intend on staying at 35" in the future.

 

I run 35's with 4.10 gears. I would highly recommend going with at least 4.88's. Having to turn off the overdrive just to go on the interstate gets old...

 

Thanks guys guess gears goes on the Xmas list but I'm sure Miss Santa will say I wasn't good enough.

 

I am running 315/75/16 with 4.10 it is not bad. I have a 6speed too, it does really well on the highway holds cruise too.

 

Be sure to put that Superchips Flaspaq on there too.