540i tranny whine

[zhandax]

I had the fluid and filter changed last week and now have a whine at the top of the shift points in first and second. I asked a mechanic buddy at work and he told me that when you flush out the gunk, it sometimes reveals weakness in the eletronics (solenoids). He mentioned also that I would not be able to tell which ones were bad until the warning light came on and I could use an OBC2 to tell me which ones were reporting faults.

Since the whine is only in first and second and I plan on installing the valve body update kit on the ZF when spring gets here, should I go ahead and replace the first and second solenoids when I install the updaate kit?

[Bill R.]

the updated part from bmw, here's the bulletin regarding that whine

I had the fluid and filter changed last week and now have a whine at the top of the shift points in first and second. I asked a mechanic buddy at work and he told me that when you flush out the gunk, it sometimes reveals weakness in the eletronics (solenoids). He mentioned also that I would not be able to tell which ones were bad until the warning light came on and I could use an OBC2 to tell me which ones were reporting faults.

Since the whine is only in first and second and I plan on installing the valve body update kit on the ZF when spring gets here, should I go ahead and replace the first and second solenoids when I install the updaate kit?

[Tiger]

Ditto!

[Bill R.]

[zhandax]

Thank you. Is it the same on the 5HP30 that I have? I have read about sucking noises from a poorly-fitting O-ring, but what I have is more of a whine and at the "just before shift" points in first and second gear. This is a Febi filter that I bought before I saw the posts about using the OEM filter.

[zhandax]

Thanks also to 632 Regal. I guess I should have read my email instead of freaking out about all those duplicate posts.

[Bill R.]

nomenclature of 5hp30

Thank you. Is it the same on the 5HP30 that I have? I have read about sucking noises from a poorly-fitting O-ring, but what I have is more of a whine and at the "just before shift" points in first and second gear. This is a Febi filter that I bought before I saw the posts about using the OEM filter.

[zhandax]

So it sounds like I should do the valve body update with a factory filter + O-ring and see if the whine goes away? I have not found a price on the solenoids. If I can get them (fairly) cheaply, would it make sense to replace them for insurance?

[zhandax]

Damn, Bill you can post this faster than I can hit the refresh button.

[zhandax]

My tech mentioned that the campaign stickers on the door may indicate that the valve body had already been upgraded for the teflon ball problem. How can I tell if that particular campaign did or did not include the valve redesign?