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Unread 04-05-2010, 03:25 PM   #1
TrueYJfan
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Axle Swap?

Looking to replace stock front axle with narrow track dana 30 from a CJ7 will this work? and if so what modifications do i need to do?

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Unread 04-05-2010, 03:31 PM   #2
crazyquadder
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should drop right in. Only thing you need to worry about is the brakes and lines. And the gear ratios .UNless your just getting the CJ one for the posi in it . It is not wurth it not to go for the dana 44.
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Unread 04-05-2010, 03:38 PM   #3
jbolty
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A narrow CJ7 is about 6 inches shorter then a yj axle. You are gonna need some crazy spacers or negative backspaced wheels to avoid steering rub.

meanwhile the YJ frame is wider so the spring perches will probably not line up.

what's your goal?
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Unread 04-05-2010, 03:40 PM   #4
TrueYJfan
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I want to swap out the vacuum enagaged four wheel drive to lock out hubs. I cant stand the stock set up on the yj I have had constant problems with it since I have been using the four wheel drive
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Unread 04-05-2010, 03:45 PM   #5
YJake
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There's an easier way around this!

Put in an XJ solid shaft/oil seal and call it a day. Much cheaper than a posi and 100% engagement every time!

I'm currently getting ready to do my solid shaft swap with spicer 760's and axle tube seals.

Jake
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Unread 04-05-2010, 03:52 PM   #6
TrueYJfan
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Are there any write ups for that swap?
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Unread 04-05-2010, 03:56 PM   #7
YJake
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This picture shows a TJ shaft, XJ shaft, and YJ shaft.


Notice how the YJ is a two piece? The XJ/TJ shafts eliminate that. I pulled my XJ shaft for $20 at the local junkyard.


The TJ/XJ shafts also have a different yoke on teh axle shaft and take different U-Joints. This is good because the TJ/XJ U-Joints are stronger than the YJ U-Joints, although the yoke is not as substantial.



And notice the difference in oil seals. The YJ shaft has no seal in the pumpkin so a special seal must be purchased and put in place where the XJ/TJ housing have been machined for that seal.


That about covers it.

Jake
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Quote:
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The 4banger only whines because it wants more!
Quote:
Originally Posted by Opihi59 View Post
3 Things to know about the forum: Always PB blaster, Always check the FAQ, Always do a search, and if none of that works, ask Mean Max.
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Unread 04-05-2010, 04:41 PM   #8
JeeperDon
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A CJ7 D30 has a right side diff, while a YJ/TJ has a left side diff. Look for a different axle.
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Unread 04-05-2010, 05:17 PM   #9
Joe Dillard
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Quote:
Originally Posted by crazyquadder View Post
should drop right in. Only thing you need to worry about is the brakes and lines. And the gear ratios .UNless your just getting the CJ one for the posi in it . It is not wurth it not to go for the dana 44.
You've gots to be kiddin'. It's not even close to being a drop-in job.

Width is wrong
Wheel bolt pattern is wrong
Differential drop (like what JeeperDon mentioned) is on the wrong side
Spring perch mounts are in the wrong location
Shock mounts are in the wrong location
It would be low pinion vs high in a YJ

Quote:
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A CJ7 D30 has a right side diff, while a YJ/TJ has a left side diff. Look for a different axle.
I agree.
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Unread 04-05-2010, 05:36 PM   #10
jbolty
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Quote:
Originally Posted by JeeperDon View Post
A CJ7 D30 has a right side diff, while a YJ/TJ has a left side diff. Look for a different axle.
DOH, I missed the most obvious problem.
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