Hi,

I'm planning to upgrade my KJ. It is model 2005, 4x4, 3.7L, Automatic transmission, lifted and all the skids, mud terrain tires (BFGoodrich), ARB bull bar and a winch (plus all the camping equipment!!).

The upgrade consists in changing the gear ratio. It actually has the 3.73 (if I'm correct) and planning to install 4.10. I'm checking some parts and brands and I would like to know if you have comments (positive or negative) about G2 Axle parts (ring and pinion)?

Cheers

Fairly positive you won't be able to install the G2 gears up front. IIRC the only company that makes gears for the D30A is Dana-Spicer. Regular D30 gears won't work. Rear end won't be a problem, though G2 gears don't have the best reputation anyways.

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- Mike
'12 JK

Jeep Tech Files

X's two on the above
read through and do a search and you'll find what most everyone is using

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MUDD'S MOTORSPORT'S We do IFS lift installs ,
03 OVERLAND EDITION /Kilby-Skidrow-Mopar-4XGuard skids/ 2.5 inch TOTAL CONTROL JBA coilovers -JBA Arms/MOABS-31 FALKEN WILDPEAK AT3W / 4.10's etc, 04 Kilimanjaro Edition loaded, plus 05 KJ limited

X3 have been shopping around 4.10s and ruled out G2, and other places with Motives or Genuines after reading reviews of Yukon's stuff for rear (ended up getting these over Superior Gears for the price - $200 vs $340).

Having a heck of a time finding the fronts here in Canada - but US is the same deal with availability for the D30a because of that longer pinion. The only two ways to get front 4.10s is to find 4-cyl KJ parts in yards/warehouse that had them stock or order the Dana Spicer D30a (I believe 84006-5 Dana Super 30 F set).

A gentleman on the boards here sells just what is needed http://www.automotivepartsunlimited.com/

Now rear axles - am weighing Superior chromoly vs. Yukon carbon steels but will do like Tommudd and slowly accumulate parts over the long term when deals can be had (no rush to re-gear and redo diffs with lockers - lots of other projects first).

Am doing most of the upgrades you list in your OP... and more. Not cheap but am really excited at what this Jeep will be like by summer!

Just Empty Every Pocket

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Huntbuggy
02 KJ Sport Silver - 2.5" OME/Bilstein lift, ARB bumper, JBA 4.5s, full factory skids, RS diff cover, rear SuperBumper on Reese 2", 245/75R16 on Cragars

Wow!!!
Thank you all for your comments!!!

i got my 4.10's from just transmissions at a good price including Master overhaul Kits

oem for the front and Yukon for the rear,

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http://www.cardomain.com/memberpage/742957
aussie KJ Lost No#150605
3" OME lift + Rancho RS9000xl's front and rear
prototype Airflow snorkel
Magnaflow cat back
265/70R16 Hankook MTRT03 on MOABS baby
4.10's and a truetrac up front
super skinks
coming soon
a myride wireless controller