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Old 01-03-2016, 04:59 PM
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Front diff notice after fluid change
Hello,I just changed my front diff oil with redline 75w90 fluid on my e70 xdrive 4.8. Went for a drive and from the front right hand side I could hear like a ticking noise or gear noise that gets louder as the car goes faster.
Did I used the wrong fluid? What did I do wrong?
Thanks

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Old 01-03-2016, 05:33 PM
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Oh yeah I forgot to mention the car has 137k and this is the first time it been changed. Also I changed the transfer case fluid with the special oil it uses.

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Old 01-03-2016, 05:37 PM
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I use Motul 75w90 synthetic in my diffs, no problem. Something touching and making the noise?
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Old 01-03-2016, 10:13 PM
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I thought I was good with redline 75w90 fluid but I guess not. I just ordered oem fluid, hopefully that helps.

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Old 01-04-2016, 01:11 PM
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Hard to believe the lubricant is the problem unless it's underfilled perhaps.
Are you sure the noise was not present before the change?
Ticking sounds more like a CV joint or wheel bearing perhaps.
Is noise worse when you drive in tight circles?
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Old 01-04-2016, 06:11 PM
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Quote:
Originally Posted by pshovest View Post
Hard to believe the lubricant is the problem unless it's underfilled perhaps.
Are you sure the noise was not present before the change?
Ticking sounds more like a CV joint or wheel bearing perhaps.
Is noise worse when you drive in tight circles?
I know is hard to belive, I've done this to all my cars and never had a problem. The noise wasn't there before the oil change. The sound comes more from the right hand side of the car, it gets louder and faster with speed.

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Old 01-05-2016, 04:48 PM
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You know, few months ago I replaced front diff fluid with Red Line and also noticed increase in noise - not by much, but still. I'm awaiting warmer weather to change it again to test the "red line sux!" theory...
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Old 01-05-2016, 05:06 PM
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Originally Posted by Price View Post
You know, few months ago I replaced front diff fluid with Red Line and also noticed increase in noise - not by much, but still. I'm awaiting warmer weather to change it again to test the "red line sux!" theory...
Just what I needed! I just ordered OEM fluid, hopefully that takes care of thr noise.

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Old 01-05-2016, 05:25 PM
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Hmmm, there are two versions of the RL 75w90, one with frictions modifiers for LSDs, and the other without.

Anyone have a source or part number for OEM fluid?
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Old 01-05-2016, 10:03 PM
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Realoem.com
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