What axles do I have?
#1
JK Newbie
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What axles do I have?
Thanx in advance for reading my novice question I have a 2012 jk unlimited (not rubicon) and I was wondering what front and rear axle I have stock. I read a few places that I have a dana 30 front axle and a dana 44 rear axle, please if you know and are reading this, verify. I have gotten unclear information from the dealer and other websites. The reason I ask is that I have 3.21 gears and 33 inch tires with 2 inch coil spring spacers. I would like to upgrade to 4.10 ring and pinion so I can crawl slower in first and use my 6th gear which I can hardly use except on flat or decline roads. Also if anyone can recommend a cheap quality bearing kit that I need to swap the gears that would be great, thanks!
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So is it possible that I have a Dana 35 or are you referring to the 2007 fiasco when they had a few different axles types installed in the beginning of that year? Sorry to press you, I'm just afraid of ordering gears that will not fit, thanks for the reply btw
#6
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I have the same model, yes 30/44 with 3:21.
If you are qualified to change the gears yourself (not easy), people are selling 4:10s all the time from Rubicons, you do have to order one probably new for the front 30 however.
If you are having a shop do the install skip 4:10 and go to at least 4:56 or 4:88. Same costs and leaves you set up for 35 tires or more.
Remember to get a procal to config everything. If you are going to wheel a lot just upgrade the front axle before putting more money into it. I regeared, reinforced now I am probably going to upgrade my axle out and waste all that money spent earlier. If you are not sure, just get the procal $150, 3:21 and 33 inch tires on the Penstar are fine until you are sure what level of mods you want for her. Good luck. I would have saved a lot of money if someone gave me this advice.
If you are qualified to change the gears yourself (not easy), people are selling 4:10s all the time from Rubicons, you do have to order one probably new for the front 30 however.
If you are having a shop do the install skip 4:10 and go to at least 4:56 or 4:88. Same costs and leaves you set up for 35 tires or more.
Remember to get a procal to config everything. If you are going to wheel a lot just upgrade the front axle before putting more money into it. I regeared, reinforced now I am probably going to upgrade my axle out and waste all that money spent earlier. If you are not sure, just get the procal $150, 3:21 and 33 inch tires on the Penstar are fine until you are sure what level of mods you want for her. Good luck. I would have saved a lot of money if someone gave me this advice.
#7
JK Junkie
4.10 will require a different carrier...
Dana Carrier Breaks:
Dana 30 - 3.54 and down; 3.73 and up
Dana 44 - 3.73 and down; 3.92 and up
Dana Carrier Breaks:
Dana 30 - 3.54 and down; 3.73 and up
Dana 44 - 3.73 and down; 3.92 and up
Last edited by OH9JK; 01-08-2013 at 05:04 PM.
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#8
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Thats awesome, thanx. I was able to pick up a dana 44 4.10 rubi set for 70 bucks, just need to find a dana 30 set and some bearings, then its off to finding lockers.
#10
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You'll need a new carrier for your front 30, but you'll be fine with the rear carrier.
All JK 44s use a 3.73 down carrier. The 4.10 and up gears are all what is known as 'thick' gears and don't require a different carrier (3.92 is an odd gear set and not relevant). Regardless of whether they are 3.21, 4.10 or 5.38, they will all fit on your rear 44 carrier.