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Old 01-24-2020, 12:11 PM
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Is this a good axle swap deal?

Someone i know is selling jk dana 44 and dana 30 with stock 4:10 from an 07 that came factory in that year for $600. These axles have 120k miles and he says they have had no problems. He’s also selling a a gusseted dana 30 without gears in the front from a 2015 for 150. The prices seem more than fair, would this be worth it? I could maybe swap ball joints from mine to the 07 ones. My alternative plans are to regear my 2016 axles to 4.56.

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Old 01-24-2020, 12:42 PM   #2
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So the plan is a cheaper way to get some 4.10's vs what you have now right? I mean its okay.. my concern would be are they bent at all.

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Old 01-24-2020, 12:44 PM   #3
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Originally Posted by Criz98 View Post
Someone i know is selling jk dana 44 and dana 30 with stock 4:10 from an 07 that came factory in that year for $600. These axles have 120k miles and he says they have had no problems. He’s also selling a a gusseted dana 30 without gears in the front from a 2015 for 150. The prices seem more than fair, would this be worth it? I could maybe swap ball joints from mine to the 07 ones. My alternative plans are to regear my 2016 axles to 4.56.
What size tires are you running? If you are running 32" tires that would work fine. If you want bigger tires you would probably be better off regearing to 4.56 at a minimum. For tires larger than 35's you would want a better axle up front.
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Old 01-24-2020, 12:50 PM
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Yea. I would like to get 4:10s or 4:56 on my rig. If i do a regear it would cost me anywhere around 2k for 4:56 where im located. Or i could maybe do this swap and get oem 4:10s for substantially less. The guy seems genuine and trustworthy. Only reason his selling them is because he got a good deal of a friends rubis who was putting in Currie 60s.
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Old 01-24-2020, 12:54 PM   #5
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Yea. I would like to get 4:10s or 4:56 on my rig. If i do a regear it would cost me anywhere around 2k for 4:56 where im located. Or i could maybe do this swap and get oem 4:10s for substantially less. The guy seems genuine and trustworthy. Only reason his selling them is because he got a good deal of a friends rubis who was putting in Currie 60s.
Well cost wise certainly works..just look them over really good.
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Old 01-24-2020, 12:55 PM
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Right now im running 33x12.5/15 stt pros on a 3.21s. I live in FL so its flats lands around here and the jeep does not seem like a dog in my opinion, but then again ive never driven a 3.8 to compare or a 3.6 on 4:10s. I plan on running 35s(ko2s 315/70/17) which run a tad small as the biggest size as its a daily driver.
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Old 01-24-2020, 01:01 PM   #7
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@GuzziMoto
Right now im running 33x12.5/15 stt pros on a 3.21s. I live in FL so its flats lands around here and the jeep does not seem like a dog in my opinion, but then again ive never driven a 3.8 to compare or a 3.6 on 4:10s. I plan on running 35s(ko2s 315/70/17) which run a tad small as the biggest size as its a daily driver.
4.10s will be night and day better... I run 4.10 with 315;s auto. and its does well even on hills.
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Old 01-24-2020, 01:06 PM   #8
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@GuzziMoto
Right now im running 33x12.5/15 stt pros on a 3.21s. I live in FL so its flats lands around here and the jeep does not seem like a dog in my opinion, but then again ive never driven a 3.8 to compare or a 3.6 on 4:10s. I plan on running 35s(ko2s 315/70/17) which run a tad small as the biggest size as its a daily driver.
My sister in-law has a JK with the 3.6, auto trans, 35" KO2's, and 4.56 gears. It works great. For that tire size, 4.10's would clearly be better than 3.21 gears but 4.56 gears would be better than either.

If you have a 3.8 motor than 4.56 gears would be even better.
I would not spend much on a D30, regardless of gear ratio.
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Old 01-24-2020, 01:10 PM
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Yea i figured. Im thinking if i do get them i can swap out some of the things from my newer axles (rear 60k miles and front has 5k) to his like ball joints and other things that might be interchangeable (idk what else could be switched i have to do research). Also maybe i should open the pumpkin and see in what shape the gears are in, he did say gear oil was changed every oil change and they are oem installed so im thinking they should be good)
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Old 01-24-2020, 01:28 PM
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@GuzziMoto
Right now im running 33x12.5/15 stt pros on a 3.21s. I live in FL so its flats lands around here and the jeep does not seem like a dog in my opinion, but then again ive never driven a 3.8 to compare or a 3.6 on 4:10s. I plan on running 35s(ko2s 315/70/17) which run a tad small as the biggest size as its a daily driver.
My sister in-law has a JK with the 3.6, auto trans, 35" KO2's, and 4.56 gears. It works great. For that tire size, 4.10's would clearly be better than 3.21 gears but 4.56 gears would be better than either.

If you have a 3.8 motor than 4.56 gears would be even better.
I would not spend much on a D30, regardless of gear ratio.
Yea i understand about spending money on a d30. Reason im considering it is because they are selling both front and rear 4:10s for 600. After the swap i can maybe sell mine a recuperate some money back if not all. I dont go off-road as much as id like since i am a full time student with aspirations on getting into Med School, so at the time i dont have money to get a d44 upfront. So im limited in options.
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Old 01-24-2020, 02:03 PM   #11
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Yea i understand about spending money on a d30. Reason im considering it is because they are selling both front and rear 4:10s for 600. After the swap i can maybe sell mine a recuperate some money back if not all. I dont go off-road as much as id like since i am a full time student with aspirations on getting into Med School, so at the time i dont have money to get a d44 upfront. So im limited in options.
You can only do what you can do.....
Something is hopefully better than nothing. My only worry is the condition of the axles. That is an old set of axles.
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Old 01-24-2020, 04:02 PM   #12
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Just regear your existing axles.


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Old 01-25-2020, 12:26 PM
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At that many miles what could need servicing or replacing? Besides the ball joints that i can switch to the ones i have on mine?
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Old 01-27-2020, 09:42 AM   #14
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Wear would could include anything that moves in the axle, depending on the care it has received (or not received) over its life. Obvious examples would be ball joints, bearings, and seals. Other wearables would include the ring and pinion gears. They should not be wearing, but if the gear oil hasn't been changed enough or if there has been water contamination they may have been wearing.
Another aspect is how straight are the axles?
If you know that yours are in good shape, then it would make sense to just regear them as it isn't that much more than buying those. And you really have no idea what sort of shape those are in. Now if you also don't know how good a shape yours are in, or you know they haven't been well cared for, that changes the balance.
Or just do it and see how it goes.
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Old 01-28-2020, 03:26 PM
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Wear would could include anything that moves in the axle, depending on the care it has received (or not received) over its life. Obvious examples would be ball joints, bearings, and seals. Other wearables would include the ring and pinion gears. They should not be wearing, but if the gear oil hasn't been changed enough or if there has been water contamination they may have been wearing.
Another aspect is how straight are the axles?
If you know that yours are in good shape, then it would make sense to just regear them as it isn't that much more than buying those. And you really have no idea what sort of shape those are in. Now if you also don't know how good a shape yours are in, or you know they haven't been well cared for, that changes the balance.
Or just do it and see how it goes.
You do make fine points. @GuzziMoto The guy seems like a genuinely good guy who wants to help a fellow jeeper out. He told me he never has abused them as it was a family beach/dog Jeep. He told me he had the rear seals replaced and the fronts never had a leaking problem. Although i have seen a couple videos and i think im capable of changing seals by removing the carrier( i cant do gears, but i think i can handle that) if it does ever leak. Ive also seen front axle seals leak with less than 10k,20k,30k,40k on them. He has a newer beefed up spare dana30 (2015 with 50k miles) that is sleeved and gusseted that is empty and cleaned that he said he would throw in for free(all for 400) , and that he has a friend that can move over the carrier/gears to the beefed dana30 for $100. His friend is a diesel certified mechanic that has done his own regears in jeeps before. Now im contemplating if i should keep the gears in the original dana30 that was geared oem to 4:10 and he knows they never gave him a problem with alignment or put the carrier inside the beefed sleeved/gusseted dana 30 for an extra $100 that he was planning to build and bought from a jeep club member. All in all if i do get the two oem 4:10a ill be looking at 400 vs 2k regear
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Old 01-28-2020, 08:22 PM   #16
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You do make fine points. @GuzziMoto The guy seems like a genuinely good guy who wants to help a fellow jeeper out. He told me he never has abused them as it was a family beach/dog Jeep. He told me he had the rear seals replaced and the fronts never had a leaking problem. Although i have seen a couple videos and i think im capable of changing seals by removing the carrier( i cant do gears, but i think i can handle that) if it does ever leak. Ive also seen front axle seals leak with less than 10k,20k,30k,40k on them. He has a newer beefed up spare dana30 (2015 with 50k miles) that is sleeved and gusseted that is empty and cleaned that he said he would throw in for free(all for 400) , and that he has a friend that can move over the carrier/gears to the beefed dana30 for $100. His friend is a diesel certified mechanic that has done his own regears in jeeps before. Now im contemplating if i should keep the gears in the original dana30 that was geared oem to 4:10 and he knows they never gave him a problem with alignment or put the carrier inside the beefed sleeved/gusseted dana 30 for an extra $100 that he was planning to build and bought from a jeep club member. All in all if i do get the two oem 4:10a ill be looking at 400 vs 2k regear
You gotta do what works for you. But I can't see putting any money into beefing up a D30 for a JK / JKU. Save that money for a better axle. If you want to do the D30 / D44 set as a cheap way to get slightly better gears, go for it. But I don't think there is any point putting extra money into an axle that will never be strong.

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