I can't see why one wouldn't work for another. Though they all have differen't part numbers. Anyone know for sure? And yes I searched

:flipoff2:

TJ and ZJ are low pinion, XJ is high pinion, most ZJ's have CV's instead of axle joints, but I don't see why they couldn't be swapped, XJ into a V8 ZJ might have clearance issues unless lifted enough. TJ, ZJ, XJ, MJ, anyway, they're still Dana 30's with coil boingers on them, as for the suspension differences? I have no tech for that, sorry.

I saw a Writeup about a XJ D30 going into a TJ I believe yesterday they only Difference was something to do with Seal and Shafts the houseing and all was the same they claimed................I will try to dig it up tonight and post the link

I am nearly certain they are interchangable. just some obvious things to look out for like the gear ratios and the early XJ ones had vacuum disconnect. Oh, also I know some use different hub assemblies, but that wouldn't be a problem if you swapped the whole axle or you just made sure to buy the hubs for the proper axle. Hmmmm... wouldn't I love to throw one of those new Rubicon TJ front 44s under my MJ.

We're swapping a ???? housing maybe ZJ, maybe XJ into an anti lock TJ.

So far it looks as if I can at the least pull the anti lock shafts out of one and install in the other. Or it looks really like I can just swap the rings.

I suggest you do what I did.

High pinion XJ D30, not all are HP only the earlier ones. Mine is a 1984.

The drivers side is totally interchangable, just keep hub matched to rotor as there are 3 different rotor hats/hub offsets (I personally like the 1997-99 TJ setup myself).

The passenger's side has some issues though.

You kinda have 2 choices keep the disco or loose it (if you want HP it will be disco too IIRC)

If you choose to keep the disco you want to run 1995.5 YJ passenger's side inner axle shaft, this is a rare find as it is the only disco shaft with a 297x joint. Then convert the thing to cable or air or whatever for the diso control, you can then weld up the pig for a semi-free slectable locker.

Same hub/rotor issues as above

OR

You can pull the carrier and install a seal in the passenger's side of the diff like TJs have (I don't think they are the same seal though) and remove all other seals and bearings from the passenger's side tube. Install Detroit and TJ (or modern XJ) passenger's side shaft.

Same hub/rotor issues as above

The brakelines match too

I just installed mine last night and it bolts right up. If you choose to get an older XJ housing like I did, make sure it is complete as the knuckles are not swappable and they have different calipers and a caliper bracket.

The HP D30 can run the stock TJ front DS with 4" of lift without issue (so far :eek:) .

I've seen the conversion and installation of two HP XJ D30's into two TJ's. Both have TJ's have 4" lift. They are, with out exception, bolt and go.. (gearing issues aside). Infact, I should say that "conversion" is probably the worst term for me to use....

Basically:

Get XJ axle. Gear. Bolt into TJ. Wheel. Pretty much that simple. Brakes bolt right up, control arms bolt right on, springs slip right on.. Away you go.

These are for non vacum XJ axles (not sure what year range) that are HP D30.

Paul, I'll PM you with a source of good info on this if you like. I was there for installation, but there are specific years, and odds and ends you may or may not want to know.

Jeep dana 30's are all fawked up.

I know that the three XJ dana 30's that I have ran across all had different style knuckles.
Also the modular hubs are different sizes.

The shit reminds me of Fords Wiring :D

I have extra knuckles and a set of hubs for you to have if you need to do any mixing and matching.

May I be so bold as to direct your attention to item #5 of the Jeep Mission Statement :D :flipoff2:

For the XJ, the D30 vacuum disconnect went away in 91. The last year for a high pinion was '99... '00 and up went low pinion (though there are a few report year end '99s with low pinions).

Uh... Steve?

Did some JU'er figure out your password?

ok. . .

84-86 XJ/MJ D30s
ALL High pinion
ALL with 207 transfer case were vacuum disconnect and have 260 ujoints
all with 228/229 transfer case were non-disconnect and had CV shafts
ALL had spindles with separate bolt-on caliper mount
ALL had stupid sleeve on lower balljoint (makes removal PITA)

87-89 XJ/MJ D30
ALL High pinion
ALL with 231 t/c were vacuum disconnect.
ALL with 242 t/c were non disco.
ALL had 260 ujoints
ALL had spindles w/ bolt-on caliper mount
ALL had stupid sleeve on lower balljoint

90-91 XJ/MJ D30
same as above, except one piece spindles/caliper mount and no more sleeve for lower balljoint, DIFFERENT UNIT BEARING THAN PREVIOUS YEARS!!

92-96 XJ D30
ALL High Pinion
ALL non disconnect
Some ABS equipped models got 297 shafts (may not have started until 94)

97-99 XJ D30
non disco, all had 297 shafts

00+ XJ D30 (same axle as TJ)
LOW pinion
non disco
297 shafts
ANOTHER CHANGE IN UNIT BEARING!!


the changes in the unit bearing pose quite a problem when interchanging brake parts. (ass, meet thorn)

Originally posted by Mo
Uh... Steve?

Did some JU'er figure out your password?

:laughing: for a customer, jeep got hit, insurance is givin her 8k to fix it needs a COMPLETELY new front diff

Originally posted by Mo
Uh... Steve?

Did some JU'er figure out your password?


Customer wrecked her TJ looking at 4:56 w/ARB built fronts.


Check it out

1 I'm Michelle oops. (Steve N)

2 Brad said pretty much the same thing

OK I know I'm still logged in as Michelle :flipoff2:


All I need to know is will a complete ZJ/XJ/TJ front diff interchange? I'm looking most likely at a ZJ one. What's up am I fawked or not?

I can take some measurements of my wifes ZJ front for comparison, but you'll need to lemme know what you want em in relation to.

Yes the ZJ 30 will bolt right up.
Bummer you posted this about a week late, I just dumped a TJ D30 housing at the metal recyclers.

Originally posted by cbassett
Yes the ZJ 30 will bolt right up.
Bummer you posted this about a week late, I just dumped a TJ D30 housing at the metal recyclers.

Yeah I have a TJ housing I can part with....

4.10s and open


To make the deal even sweeter I would consider letting you take it off my purchase of a KluneV in the future, I doubt you can beat that.


But yeah Steve they are all swappable just keep hubs and rotors togther, they don't have to be from the same housing just mached to each other.

Originally posted by mike
I can take some measurements of my wifes ZJ front for comparison, but you'll need to lemme know what you want em in relation to.


A TJ fawker!!!!
:flipoff2:
(I know you wanted actual meas.)

Chris, and TJ Freak answered my question.

Now how about a spiffy Dana 35 rear end same too?

If you want to build a nice:rolleyes: :rolleyes: dana 30, use a xj housing from newer the better.. run a passenger side WJ knuckle for cheap highsteer. You can run a seperate draglink and tierod with this setup.. everything else should bolt in right away.. the zj and wj 30's use cv axle shafts.. tj, xj use standard joint shafts.. with the newer xjs, and tj's use the larger 297x joints.

Any questions PM me

Originally posted by ImKuNfusED
run a passenger side WJ knuckle for cheap highsteer.

Sure that works just fine. :rolleyes:

How are you dealing with the hub/rotor? You didn't give that to Steve and the things don't just bolt up.

Originally posted by Steve N
Now how about a spiffy Dana 35 rear end same too?

Yeah its just as shitty as the TJ ones. ;)