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Old 01-02-2008, 09:01 PM   #1
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axles?

how do i know which differentials are on my jeep?

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Old 01-02-2008, 09:40 PM   #2
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rear axles:


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Old 01-02-2008, 09:54 PM   #3
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You have a Dana30 in the front and either a Dana35 or Dana44 in the rear. The Dana35 is round(like pictured) and the Dana44 has a metal fill plug and not so round.
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Old 01-02-2008, 09:59 PM   #4
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if he has a rubicon he has D44 fornt and rear
if he has a 4 cyl he has a D30 front and D35 rear
if he has a 6 cyl he has a D30 fornt and either a 35 or 44
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Old 01-02-2008, 10:45 PM   #5
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that would be the dana 30...... crap

I keep reading the 30 is notoriously weak. What are its limitations?
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Old 01-02-2008, 10:57 PM   #6
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that would be the dana 30...... crap

I keep reading the 30 is notoriously weak. What are its limitations?
whats your setup now?
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Old 01-02-2008, 11:19 PM   #7
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Its stock.

The Dana30 is a perfectly good axle, because its up front. Your thinking of the Dana35 in the rear being weak. You can run up to 35" tires on the front Dana30 with stock internals.
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Old 01-02-2008, 11:42 PM   #8
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I actually meant dana 35. It is stock but i was considering 35's.... eventually and i can be pretty heavy on the throttle sometimes. I just dont want to have to worry about breakage. My jeep is going to be a daily driver i cannot afford a busted diff.
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Old 01-02-2008, 11:52 PM   #9
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If you have a heavy foot, definitely look into swapping the rear out then. A Dana44 or Ford 8.8 are both viable options.

Also, the D35 starts to become "iffy" with 33" tires and heavy feet.
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Old 01-03-2008, 12:02 AM   #10
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Are the Dana 35s in the rear that bad?

I have 33' but I do a lot of highway driving.
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Old 01-03-2008, 03:12 PM   #11
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Are the Dana 35s in the rear that bad?

I have 33' but I do a lot of highway driving.
If you leave a D35 unlocked then it can survive with 33's especially if its main function is on road driving. It's when you start putting lockers in them and wheeling them hard that tires start falling off and your rear diff makes sounds like popcorn popping. It's just a weak axle all the way around. The difs, shafts, c-clips, housing deflection etc....
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Old 01-03-2008, 03:25 PM   #12
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Thinking about it, my Jeep must have a time bomb out back. Locked 35 on 35's must be an accident waiting to happen. I don't have the money for a 44, 8.8 or 9", would I be a lot better off with 33" tires?
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Old 01-03-2008, 03:29 PM   #13
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Thinking about it, my Jeep must have a time bomb out back. Locked 35 on 35's must be an accident waiting to happen. I don't have the money for a 44, 8.8 or 9", would I be a lot better off with 33" tires?
All 35's are timebombs I don't care what anyone says. However driving style can seriously affect the life of any axle whether it's a D35 on 35's or a D60 on 40's. You can keep it clean by limiting the wheel spin in rocky areas where it starts to hop. Just let off and find a better line.
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Old 01-03-2008, 03:30 PM   #14
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Originally Posted by 1BLKJP View Post
All 35's are timebombs I don't care what anyone says. However driving style can seriously affect the life of any axle whether it's a D35 on 35's or a D60 on 40's. You can keep it clean by limiting the wheel spin in rocky areas where it starts to hop. Just let off and find a better line.
But should I still go with 33's to further lessen the chance of breaking crap?
Thanks for your help
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Old 01-03-2008, 03:39 PM   #15
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But should I still go with 33's to further lessen the chance of breaking crap?
Thanks for your help
If you are looking to maximize the life of your current locked D35? Sure then 33's are less rolling mass and can help extend the life of your axle.
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Old 01-03-2008, 03:43 PM   #16
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OK, cool, thanks. Yeah thats basically what I am trying to do is maximize the life of the axle. I would be much more inclined to do an axle swap but gears and lockers aren't cheap, and since I already have them and since the locker is diff-specific I am stuck with what I have until I get the money to buy a diff, gears, and a locker.
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Old 01-04-2008, 12:01 AM   #17
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so it seems a dana 44 would be a good idea before alot of mods.

If you buy a dana 44, do you weld it to your axles or you buy a jeed specific dana 44 that comes with jeep axles?
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Old 01-04-2008, 12:36 AM   #18
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You can do a number of things. The easiest would be to find a Dana44 out from another TJ, then its just a bolt in process. But if you get a Dana44 from a Jeep XJ or MJ your looking at a little welding to get all of the correct brackets on, and same with any other axle not from a TJ. I only mentioned the XJ and MJ because they are the same width. If you happen to get an axle from say, a F250, you'd need to shorten it along with welding on brackets.
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Old 01-04-2008, 10:01 AM   #19
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Quote:
Originally Posted by King of Beers View Post
so it seems a dana 44 would be a good idea before alot of mods.

If you buy a dana 44, do you weld it to your axles or you buy a jeed specific dana 44 that comes with jeep axles?
you can buy an 8.8 and they make bracket kits for it.

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