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That's right, it's not in a place visible with the sump off as it sits on the top of the mech so to speak.
Personally I don't see point in renewing that bridge adapter on regular oil/filter change. Different thing if you are dropping mechatronik anyways for example for Sonnax zip-kit or testing/renewing solenoids.
 

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I don't see the point in not doing it since the sump will have been drained and dropped anyway, the sealing sleeve is a known common leak point and the adapter seal is also known to be one of the top causes of harsh gear shifts once it goes brittle and starts to let fluid by, since this is a job that's only done every 50 - 60,000 miles (if ZF's recommendation is followed) I'll spend the extra bit of time replacing them.
 

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Discussion Starter #26
I want to do this once and right, what is the filter part number?

anyone upgraded to a metal sump?

 

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OK guys went to the BMW specialist and apparently they did fill up the gearbox correctly. They just have another method to expell the gearbox oil first.

Anyway I watched carefully as they proceeded to do checks to top up.

I also took a gamble !

I have used Lucas fluids before with great success and thought put in 700 ml of Lucas Transmission Fix which is supposed to help prevent leaks, cure hard shifts and generally provide protection for the gearbox. Then the reset of adaptations. Before I get shouted at "Sacriledge" I thought if it didnt like it I could proceed to spend many hundreds of pounds to change mechatronic seals and more fluid and worst case scenario is new transmission if that fails.

So 140 miles later of mixed driving and wow ! what a difference. It changes gear like it thinks its a DCT system ! Downshifts are smooth as honey and up shifts are precise and confident.

Very pleased to say the least.
 
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