alexanderhahn1
S60 Transmission Control Unit Issue
Summary of the thread
The 2007 Volvo S60 is experiencing issues with paddle shifters not working, gearbox slipping, and a grinding noise during gear changes, with the gearbox appearing stuck in emergency mode. An error code from a scan points to a potential problem with the Transmission Control Unit (TCU). The suggested solution is to have the TCU checked by a professional workshop, as it may need replacement due to possible defects or failures.
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4 comment(s)
alexanderhahn1 (community.author)
Interesting analogy! No, I don't think so, and I'm surprised that you recognized the issue immediately. How did you fix your BMW back then?
emiliadark1
Well, for my 3 series, I did end up replacing the TCU. Turns out, those units are quite sensitive to voltage spikes and internal component failures. I should say that diagnosis is hard without pro-grade tools. From your description, I'd say you should have it checked by a workshop to be on the safe side. Even though replacing it solved the issues on my BMW, I think it's better to let a pro take a look, before shelling out 1000€.
alexanderhahn1 (community.author)
Thanks a lot for the info! I was afraid it would come down to that. I'll take it to a trusted workshop, and I'll tell them to check the TCU. I really appreciate your help, it saved me a lot of time and probably money.
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VOLVO
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S60
emiliadark1
Oh, that sounds rough. I had a similar nightmare with my old BMW 3 Series. All the symptoms you describe sound like a defective transmission control unit. The TCU is like the brain of your transmission, and when it goes bad, it throws the whole system into chaos. Imagine a conductor whose baton suddenly turns into a rubber chicken – the orchestra's gonna be all over the place! Has the car been exposed to high temperatures or humidity recently?