D30 inner seal question. - JeepForum.com

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post #1 of 21 Old 09-12-2012, 06:58 PM Thread Starter
jimmybob67
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D30 inner seal question.

Ok so I had to remove my right side (passenger) steering knuckle to ream the tie rod socket. All went well and drives great. Today I looked under the same area to find gear lube on the floor. Question is... If it wasnt leaking before I pulled the short shaft why is it now. Isnt the oil seal in the pumpkin? What am I missing here?

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post #2 of 21 Old 09-12-2012, 07:29 PM
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Yes the seal is in the pumpkin. You may have knocked the spring in the seal loose when you put the axle shaft back in.
When I pull my axles I use some emery cloth on the area that the axle shaft that rides on the seal. I also put some grease on the shaft.
It also may be some of the gear lube came out along with the shaft.
I would keep a eye on the gear lube level and the end of the axle tube. It could quit.

93 YJ SOA 2" springs front, XJ springs rear w/main leaf added, High pinon 9 inch rear detroit locker front Dana 44 ARB 4.56 Gears, 36 inch Irok tires too much to list. www.mijc.org
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post #3 of 21 Old 09-12-2012, 07:42 PM Thread Starter
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OK... but its a 2 piece axle the outer ending at the CAD. Is there a seal there I should worry about at the CAD? I have seen both yes and no.
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post #4 of 21 Old 09-12-2012, 07:52 PM
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Where was the oil coming from? I can't remember but I thought with the two piece axle shaft, the seal should be at the knuckle side of the cad shift fork housing in the tube so the gear oil will lube the cad system. I put tj shafts in a while ago so I could be wrong.
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post #5 of 21 Old 09-12-2012, 07:55 PM
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There is no seal at the pumpkin on the passenger when it's stock; the only seal on that side is on the outboard side of the CAD. Chances are it was old and dry or you dragged the axle over it.

You can put a seal inside the diff, if you do a one piece axle swap. Otherwise just replace what you have. It's a pita to change because of the limited access so get a couple extra and read a few write ups first.

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post #6 of 21 Old 09-12-2012, 08:14 PM
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Quote:
Originally Posted by Nickabis
Where was the oil coming from? I can't remember but I thought with the two piece axle shaft, the seal should be at the knuckle side of the cad shift fork housing in the tube so the gear oil will lube the cad system. I put tj shafts in a while ago so I could be wrong.
What did you do to the cad when you move to tj/cherokee shafts? Was it slide in and ride?
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post #7 of 21 Old 09-12-2012, 08:34 PM
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Quote:
Originally Posted by jbolty View Post
There is no seal at the pumpkin on the passenger when it's stock; the only seal on that side is on the outboard side of the CAD. Chances are it was old and dry or you dragged the axle over it.

You can put a seal inside the diff, if you do a one piece axle swap. Otherwise just replace what you have. It's a pita to change because of the limited access so get a couple extra and read a few write ups first.
oops sorry it has been a while since I had the 30 in front of my Jeep.
If you need a hand putting a new seal in send me a PM. I would be glad to help. (I am in Morton IL)

93 YJ SOA 2" springs front, XJ springs rear w/main leaf added, High pinon 9 inch rear detroit locker front Dana 44 ARB 4.56 Gears, 36 inch Irok tires too much to list. www.mijc.org
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post #8 of 21 Old 09-12-2012, 08:41 PM
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Quote:
Originally Posted by evanjeep

What did you do to the cad when you move to tj/cherokee shafts? Was it slide in and ride?
I left the vac motor and fork in the tube, it doesn't ride on the shaft or do anything but slide back and forth when I shift into 4wd, I left it all there because I didn't make a block off plate, to lazy, and I still have my 4wd light.
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post #9 of 21 Old 09-12-2012, 08:42 PM Thread Starter
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Quote:
Originally Posted by jbolty View Post
There is no seal at the pumpkin on the passenger when it's stock; the only seal on that side is on the outboard side of the CAD. Chances are it was old and dry or you dragged the axle over it.

You can put a seal inside the diff, if you do a one piece axle swap. Otherwise just replace what you have. It's a pita to change because of the limited access so get a couple extra and read a few write ups first.
I found a write up on it. Now it all makes sense, shouldnt be too hard to do.
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post #10 of 21 Old 09-14-2012, 03:38 PM Thread Starter
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for those who have done this... is this the correct seal for the CAD side of the axle?
http://www.napaonline.com/Catalog/Ca...843_0159642529
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post #11 of 21 Old 09-14-2012, 08:38 PM
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If your putting back to stock specs then no, but if your doing the tj shaft upgrade then

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If you are a mechanical neophyte and have to repetitively intone the mantra of "lefty loosey," are a mouth breather and only own a hammer, it will be more of a challenge.
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post #12 of 21 Old 09-15-2012, 05:42 AM Thread Starter
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going back to stock. but cant seem to find the right one.
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post #13 of 21 Old 09-15-2012, 07:12 AM
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The description you need to give them is dana/spicer 30, front right w/ disconnect. At oreilly's its National brand, part # 710202. the one you showed above looks like the left side, (yeah, i know it says right) or maybe is for the non- disconnect type dana 30.

The $100,000,000.00 piece of advice is.......... Pick up a couple of extra seals and a bucket full of patience.

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Quote:
Originally Posted by Opihi59 View Post
Welcome to the forum.
If you are a mechanical neophyte and have to repetitively intone the mantra of "lefty loosey," are a mouth breather and only own a hammer, it will be more of a challenge.

Last edited by jeep108; 09-15-2012 at 07:13 AM. Reason: Sapeling
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post #14 of 21 Old 09-17-2012, 03:30 PM Thread Starter
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Well The front end is all torn apart.
There was some dirt inside the CAD housing and in the outer tube. The seal looks and feels good. Smooth and the spring is still there. Did your seals have visible wear or tears??? I would like to think the leak was caused by the amount dirt around the seal. Dont want to go through the hell of replacing the seal if not needed.
What do you think?
Also the intermediate shaft just pulls out. Is this normal? I was thinking there was a C clip in there??
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post #15 of 21 Old 09-17-2012, 04:00 PM
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Quote:
Originally Posted by jimmybob67 View Post
Well The front end is all torn apart.
There was some dirt inside the CAD housing and in the outer tube. The seal looks and feels good. Smooth and the spring is still there. Did your seals have visible wear or tears??? I would like to think the leak was caused by the amount dirt around the seal. Dont want to go through the hell of replacing the seal if not needed.
What do you think?
Also the intermediate shaft just pulls out. Is this normal? I was thinking there was a C clip in there??
I have heard that sometimes there is a c clip in there from the factory but it's not required and does not have to be in place.

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