Hello, I’ve got a 2006 Q7 (200k miles) with an auto transmission (09D made by Aisin) which operates absolutely fine when cold, perfectly smooth. However once the transmission oil temp gets above 50degC it does not shift well at all. It seems like it is holding mid shift and then there is a big jerk as the car changes gear. The fluid was change about 20k miles ago and there was maybe a slight improvement but it’s worse now. I am unsure if the filter was replaced
As it shifts perfectly whilst cold but only has problems when the fluid is warm it makes me think that it is an issue with the fluid being degraded rather than any internal wear or damage. Would it be worthwhile trying a proper fluid flush and changing the filter? Or whether it’d be better not to waste that money and get a low mileage or recon box instead? Any suggestions much appreciated
As it shifts perfectly whilst cold but only has problems when the fluid is warm it makes me think that it is an issue with the fluid being degraded rather than any internal wear or damage. Would it be worthwhile trying a proper fluid flush and changing the filter? Or whether it’d be better not to waste that money and get a low mileage or recon box instead? Any suggestions much appreciated
