IS F (2008-2014) Discussion topics related to the IS F model

Metal shaving in rear differential

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Old 05-22-19, 12:17 PM
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v8sedan
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Default Metal shaving in rear differential

Hi, i just got a call by the mechanic saying that there is a lot of metal shaving in my rear diff oil, as i bought the car used i cannot tell if the oil has been changed in it or not , i just want to know if it's an issue or somehow nornal, car is 2008 with 65000miles , tanx.
Old 05-22-19, 04:33 PM
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Mr.NA_T
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Bump!!!!! I would Like to know too!
Old 05-22-19, 06:03 PM
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v8sedan
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I can't believe i would be the only one,
Old 05-22-19, 07:02 PM
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The metal shavings aren't in your diff oil, they're stuck to the magnet as intended. It looks a bit heavier than I would be happy about. Start saving for a junkyard unit with a Torsen, or get the cheap one and stuff an OS Giken LSD in it. You will love the change it makes to the car.
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Old 05-24-19, 07:15 AM
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MisterSkiz
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Wow. That is a lot of shavings. My 08 with 65k on it had some small "sludge" attached to the drain plug, but nothing like that.
Old 05-24-19, 02:51 PM
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Yep it's a much but if the diff is quite with new oil don't worry to much, Always keep a eye out for a 2011 diff yesterday I had some circle work fun if you get the DRIFT cheers.
Old 05-24-19, 05:38 PM
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mike33
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Originally Posted by MisterSkiz
Wow. That is a lot of shavings. My 08 with 65k on it had some small "sludge" attached to the drain plug, but nothing like that.
I had the same, just a small amount of ''sludge'' at 82k... That looks like it was dipped in the metal shavings bin from a brake lathe.
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Old 05-24-19, 10:07 PM
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RRocket
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It doesn't look horrific IMO. You should have seen the FLAKES from my KTM break in!

Not much you can do but put some quality fluid in there and see how it goes.

Personally, I'd not be terribly worried.
Old 05-25-19, 07:55 AM
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Jwconeil
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Just keep some diff money in the bank. You may need it, may not. This is not an area I have experience in. I pay for diff work, or mine would surely blow.
Old 05-25-19, 09:08 AM
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Tanx for the reply , the mechanic was more worried than me 😂, maybe the 70+ drag passes have a little to do with this , i'll wait to see if it blows or not while saving for a lsd unit.
Old 05-25-19, 11:31 PM
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JETMIKE007
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My 2008 is350 looked exactly the same with 65k. Nothing to worry about, it's regular wear and not a large amount of metal considering the size of the diff gears. As long as you don't have metal chunks you're ok. What you have is fine metal dust. Just make sure the diff oil is serviced correctly. I can't believe the tech was actually concerned about this?
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Old 05-26-19, 03:00 PM
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Since there are no other wear metals in your diff (no aluminum, bronze, or non-magnetic steels), what you are seeing is abrasion of the teeth from heavy use. It's good you're changing the oil. If you plan to continue drag racing, you might want to consider a more suitable gear oil for your purpose. Red Line's shockproof line offers greater wear protection under hard use, just be sure to follow their directions to get the most out of it. Beyond that, keep your eyes open for a spare diff so you'll be ready when the time comes. The open spool units are usually pretty cheap from the junkyard because it's very rare the diff gets damaged in a wreck.
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