B8 B8 RS4 gearbox issue

[youdame86]

So I got a warning msg today, saying “gearbox malfunction”.

The car continued to run fine, however, at idle, I noticed the idling RPM to be slightly higher, at 1,000 instead of the usual 800 rpm. It felt like the clutch was not engaging fully.

This was after I swapped out a completely new DL501 mechatronic unit in December 2019. The changes I made in between, that might’ve affected the gearbox, is the 034 aluminum transmission mount insert and the transmission mount rubber. I installed them a month ago and the car was running fine until yesterday.

Anybody had similar experiences like this? I spent like 3 months out of action last year just sorting, ordering the DL501 and I really don’t want to go back to that ugly place again. It shouldn’t break down so quickly. I’m a bit lost as to how to fix this.

Any help would be appreciated

Best Regards,
Andrew Y.


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[JohnS3]

You need more details of the gearbox malfunction message. Have you scanned the car for fault codes?

 

[youdame86]

You need more details of the gearbox malfunction message. Have you scanned the car for fault codes?

Thanks, sorted it out in the end.

Turns out it was a few defective solenoid valves in the DL501 that caused the issue. After a rebuild kit replacing the solenoid valves everything went fine.

Excuse my desperate tone in previous post as I had so many breakdowns/problems before due to a previously faulty mechatronic unit. I was glad this was just a fast fix; pricey at HKD4,500 though


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