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Unread 08-01-2013, 04:01 PM   #1
ZJ1998
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Join Date: Jan 2010
Location: Park City, UT
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Dana 300 tear down

Have a Dana 300 with a bad leak. I had the lower seal replaced but it seems it is still leaking from the center piece (indicated by arrow). I'm wondering how hard it would be to tear this down by myself and re-do all seals? Any thoughts or write-ups that come to mind?



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93 YJ I6, 5spd, Dana300, twin stick, 35's, D44 front and rear, 4:88 gear
98 ZJ I6, 2"BB, 31's, stock
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Unread 08-04-2013, 07:32 AM   #2
ZJ1998
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one last try with a bump to top...any takers?
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93 YJ I6, 5spd, Dana300, twin stick, 35's, D44 front and rear, 4:88 gear
98 ZJ I6, 2"BB, 31's, stock
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Unread 08-04-2013, 08:22 AM   #3
SeanB95YJ
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sorry no help from me other than to suggest you also post this in the CJ forum - might have better luck getting more responses there as the YJ never came stock with one, but lots of CJs did.

Good luck
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Unread 08-04-2013, 08:32 AM   #4
jokerchief462
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Remove the case and if all you have to do is seals pretty straightforward.

Clean the exterior with a degreaser, wire brush and green scrubbers.

Get a seal remover tool NAPA $8. Use it to remove the seals and compare each one to the new ones to make sure they are correct.

Grease the shaft the new seal goes over or when you reinstall the yokes. Carefully install the new seals.

I start with a small ballpeen hammer and tap it around to get it started and finish driving the seal into the case with a socket. Most of those will be from a 3/4 drive set. If none available continue carefully using the hammer.

If you need to split the case you really need to find at least an exploded parts diagram, or the manual.

Fortunately we run 231s and they are very simple. Hope that helps.
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