I got a 2008 Audi A4 2.0T and when I'm driving at a constant speed lower than 60Km/h, my engine begins to rev up then down constantly maybe 300RPM's. Example, I was going 50Km/h and my tachometer needle moves back and forth about 300RPM. Anyone know whats thats about???

 

check sending unit on tranny.

 

So I'm guessing this isn't normal. It's still under warrenty. What should I tell them is the problem? Sending unit to transmission isn't working properly?

 

I've noticed this on mine when it's really cold, after 1-2 min of letting it warm up while i scrape the windows it's usually gone.

If it's something that's happening regularly I'd get it looked at like petzl already mentioned.

 

I wouldnt give them any more ideas on what is causing the problem, just tell them what you are noticing - since its under warranty, its their job to do the problem solving!

Good luck!

Chad

 

Sounds good. I'll let you guys know what the find.