Problem Differential settings not adjustable?

I've only tried the GTR3, Silhouettes & DTM 2015 classes since the latest update but I found I cannot change the power & coast differential settings but I can adjust the preload settings. Is this normal or a rules restriction in the class?

 

Its normal as its done to current real life specs of the cars. Read up on the patch notes to see whats been changed.

 

Thanks. I didn't see that mentioned in the release notes unless I looked over it.