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
Bookmark it.

Ohh wow, good one.

Well 5he sound still there! I read you have to code the transfer case for the new fluid but in all the diy don't mention that. Can anyone who done this chime in.

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That's what my buddy who's a tech at BMW told me. The TC needs a reset, but he said it was just a "reset counter" for my 2012.

Found the factory diff fluid, $50 for 3 half liter containers. Do you recall how much fluid went into each diff?

Might as well try that. The front fluid took one liter, I didn't do the back diff.

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Thanks, I'll order 3 liters.

Just finished chatting with my buddy. He said, "adaptions need to be reset to factory settings for the new fluid/wear/driving profile."

[QUOTE=Mflara420;1064427]Might as well try that. The front fluid took one liter, I didn't do the back diff.
Can you please ask him if I really have to take it to the dealer.



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Yes, it's part of the drain and refill of TC procedure.

The last transfer case procedure I saw at the dealer was for an e60 and it retailed for $450.00. No kidding. $450.00

:wow: $450 for some fluid and to CTRL+ALT+DEL a module. SMH

Can you use INPA to reset it?

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The answer is yes. Go search on this forum or bimmerfest I can't remember. I used INPA to reset my TC adaptation and register the new battery.

GL

Technically, you should only put 650 ml in the front diff. Why? Ask BMW...

I thought 650 was for the transfer case?

confession: the first gen X5 we traded in at 170k miles. diffs and transfer case had original fluid in there. I changed the transmission regularly but never touched the diffs since they were not limited slip.

TC takes ~full bottle (~1 liter)

I filled it till it flow out the fill hole

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Where in inpa can I reset it. I cant find it anywhere

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Here's a video.
https://youtu.be/LrJXNubfjLo

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So I replaced RL with Liqui Moly and I think (for what it's worth, as this is a totally subjective, unscientific, "butt dyno" opinion), it did help with noise, i.e. I can't hear it anymore over engine/tire/etc. noises.

Currently at the shop getting diagnosed.

Just got it back from the shop. And all it had was a bracket with a cable attached to misplaced at the top of the transfer case. Expensice lesson learned.

How did that happen?

Thought the only thing you did was fluid change...

Well, hey- COULD have been worse. Hope it is truly the end of the story.

:thumbup:

I guess I misplaced it without realizing it.
You're right but that hurt my ego when he told me that.

Always go with the original fluid....

LOL to those who blamed the oil: you guys spend way to much time on forums... :stickpoke

And by the way... front and rear differentials use different oils

Please, do tell us more

Is true, I been running that fluid for a couple months with no issues I'll just change it for piece of mind.