Lance72

This is not my first jeep but this is the first time I have had a budget to make any upgrades. I guess that makes me a nube. I have a 2013 unlimited sport. I know I have 3.21 gears in it. I found a guy that has a set of 4.10 gears out of a Rubicon. If I understand it correctly I shouldn't have any problems with the rear but will the gears fit in the front Dif? Thanks for any advice you can give.

karls

No, they will not fit. The d44 and d30 use two different size ring gears.

JKPE

The short answer is no. The different axle sizes are really about the carrier or pumpkin, the axle tubes just allow more room for larger axle shafts.

Dana 30 uses a 7 1/8" ring gear
Dana 44 uses an 8 1/2" ring gear
Dana 60 uses a 9 3/4" ring gear
Dana 70 uses a 10 1/2" ring gear

The gear ratio, in this case 4.10, is the number of teeth on the ring gear divided by the number on the pinion. Rubis have front and rear dana 44's where as the rest of us have Dana 30s and axle envy!

Lance72

Thanks for the quick answers guys. If all goes well I'm putting a 2" spacer lift and 33" tires on this weekend. Hopefully It won't feel to sluggish with the larger wheels and my 3.21 gears, but I guess I'll find out soon enough.

Also just an afterthought. Will a 33" tire fit on the stock spare tire holder or am I going to have to upgrade my back bumper sooner rather than later?

jadmt

33" fit fine and a 34" will fit but is tight lol.

Lance72

Awesome! Thanks!

Liquid741

I have 33's with 4.5" of back spacing. Fits perfect. Also 3.21 gears. Not sluggish at all. However when I upgrade further to 35"s I plan to go to 4.1 gears, new front drive shaft and gussets. I'm timing the wife Argo for the next upgrade.

Gman*2007

Good luck on your mods & welcome to the forum.

scooby snacks

Welcome to the forum. Plenty of folks on here willing to share their knowledge. You'll be an expert in no time!!