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Unread 07-17-2010, 06:58 PM   #1
parcours
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Rubicon Rear Diff Gear Oil Change

OK guys, I just changed my rear diff gear oil to 75W140 Synthetic after running 80W90 dino for ~1500 miles and the magnet(s) (both) had more metal dust that I expected.

I purchased the Rubicon about a month ago and have been going through systematically changing maintenance items, (coolant, belt, hoses, spark plugs, oils). The Jeep has 58K and since I don't like being stranded, changing all the fluids was required.

My main concern is the rear diff oil. I drained the 58K miles oil and it had metal dust on the magnet as I expected. I put in dino 80W90 just becuase I didn't have the 75W140 Synthetic. I ran the Jeep for 2K miles and changed the rear diff oil again. The amount of metal dust on the magnet was a lot less than the 58K drain, but more than I expected.

How much metal dust is normal in a D44?


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Unread 07-17-2010, 07:59 PM   #2
RubiconBlack
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Did you "clean" aka use brake clean or degreaser to clean the inside of the diff? If you try cleaning the diff with some good brake you will see the clean carrier, ring, pinion,etc. The newer oil will clean too. Like a good synthetic should. Maybe go half of the recommened mileage with the synthetic and see what you find.
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Unread 07-17-2010, 08:38 PM   #3
parcours
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I didn't remove the diff cover thinking 58K miles shouldn't be an issue.

Maybe I'll check it again in 1K or so miles. If the synthetic has a similar amount of metal dust, I'll take it apart and clean the diff.

BTW, the front diff didn't have as much metal dust as the rear. I'm hoping it's not a drive line alignment issue.


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Unread 07-17-2010, 10:59 PM   #4
glockster
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SO the drain plugs in the rubi d44's have magnets on them? I learn something everyday I tell ya. I've never removed them, I always remove the covers and use brake cleaner to flush them out and take a look around while I'm in there.

Probaly will use the drain plugs next time tholugh as I've never had a problem.

Probably just some residual metal shavings in there from the original juice.
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Unread 07-18-2010, 07:26 AM   #5
parcours
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Quote:
Originally Posted by glockster View Post
SO the drain plugs in the rubi d44's have magnets on them? I learn something everyday I tell ya. I've never removed them, I always remove the covers and use brake cleaner to flush them out and take a look around while I'm in there.

Probaly will use the drain plugs next time tholugh as I've never had a problem.

Probably just some residual metal shavings in there from the original juice.
Actually, both the fill and drain plugs have magnets. This is a nice feature.

I drained and refilled the transfer case also, no magnet on the drain plug.
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Unread 07-18-2010, 07:59 AM   #6
RubiconChris
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I have a 05 Rubicon with 60k and mine had a decent amount of metal also. I hope its not a big deal.
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Unread 07-18-2010, 01:16 PM   #7
glockster
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Quote:
Originally Posted by parcours View Post
Actually, both the fill and drain plugs have magnets. This is a nice feature.

I drained and refilled the transfer case also, no magnet on the drain plug.
I knew about the fill plug magnet as I re-used it when I went with the SOLID covers. I'm sure I blew the crap off the drain plug magnet when I hit it with the brake cleaner.
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Unread 07-19-2010, 12:50 AM   #8
bojang
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Quote:
Originally Posted by parcours View Post
Actually, both the fill and drain plugs have magnets. This is a nice feature.

I drained and refilled the transfer case also, no magnet on the drain plug.
There is a magnet just on the inside of the case, behind the drain plug.
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axle , metal , rear , rubicon , shaving

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