Pete1971

gonna be doing a gear swap by years end on my 2012 jk 2 door auto 3:21's, going with 4:10's (99% street on 34's) I know I need a carrier for the front but can I still use the whole housing or do I need a whole new front end ? what about the back which is a 44 do I need a carrier for that also or just the front, just want to make sure I get all the parts I need.

I will be getting a master install kit, gonna keep stock axel's

shawnphi1

New carrier for front only is needed since u have 3.21 gears now. The d30 is fine for 34" tires and 4.10 should be good for it for mainly street use. Rear will be fine unless ur wanting to upgrade.

nthinuf

Yep, the rear d44 carrier is fine.

A new open carrier for the front d30 is under $100, or any of the full case limiteds/lockers can be used instead, if you have any interest in adding traction. (truetrac, arb, e-locker, etc)

Northridge4x4

As mentioned just a front carrier is needed. Dana offers one that allows you to re-use the factory spider gears while will save you a few bucks.

We have it as part of our gear package, and we could do 4.10's with this as well.

https://www.northridge4x4.com/part/d...r-overhaul-kit

Pete1971

thanks for the help guy's

Trail Jeeps

Hey there. I'm going to throw my $.02 in here. Obviously this is all money, and it doesn't grow on trees. Gear are expensive already but since you're already replacing the carrier in the front, I would install a Detroit TrueTrac. Sure, you're mostly street and that's cool, but a TrueTrac is a really smart upgrade and since you're already paying for the labor to replace the carrier, now is the time.

tarpon4me

That's great advice. A TT is an amazing upgrade.

Smudgeontheglass

Although, before you do that, read this thread first:
https://www.jk-forum.com/forums/modi...omatic-260152/

jeepinmichguy

A non selectable locker causes issues not a truetrac limited slip.

Smudgeontheglass

I realized this after I linked it. It is still worth reading in case it gets taken to a shop that may recommend otherwise.