Does anyone have any experience with the changing of differential gears on the Wrangler JK 2007 Unlimited. I have the Dana 30 (front) and Dana 44 (rear) I've found a gearing kit on ebay (listing #390069155638) that sounds pretty good. I would like to get as much power out of the jeep so I think a 5.13 would be best. I'm running 35's on the jeep and am definitly underpowered. I could get the 4.88. Gas milage is not an issue. Basically I would like to find out if anyone is happy with the change over and has much better power. I already have the cold intake and a cat exhaust. Also if anyone has a good supplier with quality parts let me know. Thanks and any information would be appreciated.
Mark

 

I did the same setup with my truck, d30 with 5.13. Lasted one week and broke the ring gear on the first trip out. Dana 30 pinion gear is very small and flexes. I ended up getting the D44 from a Rubicon and doing it all over again. In the end that trip cost me one ring & pinion, one axle U joint,frt track bar and a 12,000 lb winch. I have a 2007 Unlimited with 3.5 in lift d44's frt and rr w/ 5.13 [this configuration works great], Air raid intake,Flow master muffler [doesn't sound like a minivan anymore] and a Superchip Flashpak. All in all still needs more power.

 

thanks for the info, definietly gives me something to think about. Changing out the front to the dana 44 probably cost a few bucks so I might see if I can sell what I have and upgrade to the Rubicon.