is this possible? i have an 08 unlimited sahara, 6 speed d44 rear / d30 front

i have access to 4.10's and want to know, can i just take out my old 3.21's (argggh!) and drop in the 4.10's? (not me, the shop!)

 

Yes, you can run 4.10's. But you'll need a new carrier up front, as 3.73's and up use a different one than the 3.21's. The shop should be able to get it, or try northridge, or wherever.

 

make sure the 4.10s came from an x or sahara and not a rubicon

 

i think rubis are 4.11

 

4.10 put they are diff than the D44 in the rear of an x and the front is a D30 of course

 

so 4.10 take offs from a rubi will fit in my stock housings then? d30front / d44 rear sahara? nothing else needed?

 

no. you can not use rubicon gears in an x or sahara.

 

You can use the rear R&P from the Rubi D44 in your D44 rear. You need a D30 gear set up front and all Rubi's are D44. So the front will not fit.

 

The D30 up front needs a new carrier. Since you're going to have everything out already, you might as well install a selectable locker (ARB or E-Locker). There is no point doing a gear job only to have an open carrier installed. So, the new selectable locker WILL be your new carrier. So, you'll need the ring and pinion, install kit, and locker.

The D44 ring and pinion are the same in all trims (X, Sahara, and Rubicon). The difference here is the carrier. The carrier in the Rubicon is made to handle 32-spline axleshafts, where the X and Sahara D44 is made to handle 30-spline axleshafts. So, again, since it's all tore apart, get yourself another lockable carrier, selectable or not (ARB, E-Locker, Detroit). You'll need the ring and pinion, install kit, and 30-spline locker.

 

were TJs 4.11? I get the d44/30 carrier difference.