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Unread 03-26-2013, 08:54 PM   #1
Grand_ZJ
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So I want to change out my current axle shafts (cv) to some u joint shafts and had a few questions regarding the swap.

I have a 98 limited with a d30 from a 95 zj that had cv's.

Now I hear that if I want to change the shafts I need to worry about the stub shaft lengths to make sure they are the same length, so as not to risk ruining the hub's.

Ive always thought that the shafts were the same length as in any zj, xj and tj d30. Am I wrong in thinking this??

And any particular year of xj axle shafts I should look for as they are stronger then the rest? (I.E. u joints etc etc)

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Unread 03-27-2013, 06:17 AM   #2
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As far as length of the stub shaft they should be the same. The main thing to watch out for is that the tone wheel for the ABS sensors is there (if it;s not from a ZJ aplication).

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Unread 03-27-2013, 07:24 AM   #3
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some older xj's have a disco long shaft axle that wouldnt work for a direct swap but I believe from what i have read that you should be okay swaping around shafts. Tj/Zj/(most)Xj d30's use the same guts
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Unread 03-27-2013, 08:34 AM   #4
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Unless you are upgrading to alloy shafts I don't see much point swapping out the cv shafts for cardan shafts.
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Unread 03-27-2013, 10:02 AM   #5
Grand_ZJ
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Quote:
Originally Posted by Technohead View Post
Unless you are upgrading to alloy shafts I don't see much point swapping out the cv shafts for cardan shafts.
I agree to a point and that being is my shafts are spewing grease and I believe the driver is clicking.
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Unread 03-27-2013, 02:55 PM   #6
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i've broken a half dozen cv shafts and never even replaced a u-joint for wear. had the u-joints shafts in longer and with much bigger tires.
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Unread 03-27-2013, 03:23 PM   #7
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The D30's axle shafts certainly don't hold up if you like to baja as much as me. Rat knows his stuff about axles though, he is picking out my next one after mine grenades in Moab this weekend.
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Unread 03-27-2013, 04:02 PM   #8
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i blew up both cv shafts in devils den in 3 minutes with a front locker on 33s. put in ujoint shafts and it was good till i pulled the axle.
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Unread 03-27-2013, 06:10 PM   #9
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I've got at least 10 broken u-joint shafts laying around. All from the last 3 seasons.

If you are doing any serious wheeling then you really need alloys. And its no coincidence that the strongest alloys on the market use CV joints.

The nice thing about the stock cv shafts is that they are dirt cheap.
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Unread 03-27-2013, 06:59 PM   #10
Grand_ZJ
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I had u joint shafts in my old d30 but when I swapped axles I never put them in as ive been told that they differ from the stub that sticks out of the hub. So if its too long itll screw up your hubs and too short it obviously wont work.

This is just what ive heard from an offroad shop here in vegas. I always thought a d30 is a d30 so theyre the same. Because its interchangeable.

I dont do much extreme offroading but on occasion ill do some rock crawling.

Basically I was wondering if a certain year xj is better. Didnt a certain year(s) xj's have the bigger 760 joints in them???
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Unread 03-27-2013, 07:18 PM   #11
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. . . Basically I was wondering if a certain year xj is better. Didnt a certain year(s) xj's have the bigger 760 joints in them???
They did not come with the 760 joints. I don't even think 760's existed when XJ's were rolling off the assembly line. From 96+ (and possibly earlier) they came with 297x joints which can be replaced with 760 joints.

But the strength of the joint is basically irrelevent for D30 shafts anyway. 99 times out of 100 its the yokes that break.
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Unread 03-27-2013, 08:04 PM   #12
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They did not come with the 760 joints. I don't even think 760's existed when XJ's were rolling off the assembly line. From 96+ (and possibly earlier) they came with 297x joints which can be replaced with 760 joints.

But the strength of the joint is basically irrelevent for D30 shafts anyway. 99 times out of 100 its the yokes that break.
You used that almost alloy kit from IRO? Wouldnt that help? By yoke do you mean the Ears?
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Unread 04-29-2013, 10:34 AM   #13
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The whole red circled area is the yoke. It's the part that helps extend or shorten your driveshaft when in off camber situations.
dsc06648.jpg  
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Unread 04-29-2013, 06:13 PM   #14
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Quote:
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The whole red circled area is the yoke. It's the part that helps extend or shorten your driveshaft when in off camber situations.
while technically correct, they are talking about axle shafts, not drive shafts.


I will say, i have broken 3 CV style shafts, but never a U-joint shaft on larger, more aggressive tires. broke the 3 CV's on only 31's, but ran 33's on u-joints with no issues.

they each have pro's/ cons. If you break a CV, no big loss you can still get home. break a u-joint and you better have a spare, as if it is the yoke ears that break they like to hang up on things while still spinning in the axle.

as for the swap, 97+ XJ have the larger joints.
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Unread 04-29-2013, 06:29 PM   #15
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Quote:
Originally Posted by underpowered View Post
while technically correct, they are talking about axle shafts, not drive shafts.


I will say, i have broken 3 CV style shafts, but never a U-joint shaft on larger, more aggressive tires. broke the 3 CV's on only 31's, but ran 33's on u-joints with no issues.

they each have pro's/ cons. If you break a CV, no big loss you can still get home. break a u-joint and you better have a spare, as if it is the yoke ears that break they like to hang up on things while still spinning in the axle.

as for the swap, 97+ XJ have the larger joints.
As long as you can knock the joint out you can get home with the stub shaft still intact
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