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      02-01-2006, 01:40 PM   #1
epiphone3
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Manual Tranny & Differential Oil change after break-in (E90Fleet around?) ?

I am looking for our true tech gurus to shine here.

I am changing my engine oil once my break-in is done (only about 750km left) and I was thinking about doing the manual transmission oil and the differential oil as well.

Any downsides to doing the manual transmission oil, other than cost?

Any downsides to doing differential oil? I have heard that completely bleeding the differential in the E90 is not a good idea due to its design... is this true?

Any other thoughts? I think it is cheap insurance and I am trying to get good, researched/proven thoughts from this forum.

Last edited by epiphone3; 02-01-2006 at 04:37 PM.
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      02-01-2006, 07:41 PM   #2
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      02-01-2006, 08:05 PM   #3
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Quote:
Originally Posted by epiphone3
I am looking for our true tech gurus to shine here.

I am changing my engine oil once my break-in is done (only about 750km left) and I was thinking about doing the manual transmission oil and the differential oil as well.

Any downsides to doing the manual transmission oil, other than cost?

Any downsides to doing differential oil? I have heard that completely bleeding the differential in the E90 is not a good idea due to its design... is this true?

Any other thoughts? I think it is cheap insurance and I am trying to get good, researched/proven thoughts from this forum.

So far, as far as I know, noone from this forum has had the differential & tranny changed. I was tempted, but there are many many threads here that talks about BMW's new "lifetime fill" for both the tranny and diff.

Basically, I don't think there is any harm in changing them both out as long as you replace with the same OEM fluid or better. Some posts here have stated that the dealer won't do this service even if you try to pay them, unlike engine oil, but I could be wrong. So you can either try your dealer, DIY, or take it to a independant shop.

Danny
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