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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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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I use Motul 75w90 synthetic in my diffs, no problem. Something touching and making the noise?

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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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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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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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?

Realoem.com
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