Selector Shaft Seal for 3HP12

[Clevis Woodruff]

I've read the archives but haven't been able to find the dimensions for the O-ring that keeps automatic transmission fluid from drooling out from around the gear selector shaft.  The BMW part number is 24-12-1-666-382.

 

All of the usual online part suppliers and several BMW dealerships with an online presence show the part number, but nobody in the U.S. appears to have even one in stock: they all tell me it has to come from Germany.

 

It's hard to believe that the O-ring used for this particular application is unique from every other O-ring ever used by BMW.

 

I'd prefer not to take my car out of commission for a week or more and resort to dropping the transmission pan and removing the selector shaft just to measure the O-ring and try to I find a metric one that matches the size.

 

Does anyone have a known source or the precise dimensions for this little thing?

 

Thanks!

[BarneyT]

All I can say is get way more than one, they tend to be cut in half as you push them in by the cut outs in the side of metal sleeve they push in too…mine still drips…

[Mike Self]

Wouldn't a quick e-mail to the US subsidiary (it's a ZF, isn't it?--and they have a facility in Illinois, IIRC) elicit that information?

 

mike

[jimk]

There should be vent, all boxes do, and is it clear?  Any internal pressure will push fluid out seals.

[Clevis Woodruff]

I'll reach out to ZF -- thanks for the suggestion.

 

I don't know the location of a breather/vent on the 3HP12.  I'll look around and see if one is conspicuous.

[Schnellvintage]

Look at the BMW 2002 parts book, page 488.  I got that from the online parts book from this website.  16mmx2.5mm is the o-ring size.  This Forum has an immense amount of information.  Lots of extra info in the parts book.

 

Cheers,

Matt

 

 

Edited March 12, 2022 by Schnellvintage
typo

[Clevis Woodruff]

Thank you, thank you, thank you!!

 

Could you do me the additional favor of pointing me where to find the BMW Parts Book?

 

The ‘02faq lists a few books but none seem to be what you have. 

[Son of Marty]

To prevent cuts to the seal when pushing it over cut outs on the shaft try wrapping it with a layer of manila envelope then greasing it before sliding the seal over it. 

[2002iii]

18 minutes ago, Clevis Woodruff said:

Thank you, thank you, thank you!!

 

Could you do me the additional favor of pointing me where to find the BMW Parts Book?

 

The ‘02faq lists a few books but none seem to be what you have. 

Go to the Articles section: Technical Articles section: History and Reference section: the parts catalogs are in 2 parts near the bottom of the page.