Board Thread:Theories and Speculation/@comment-1512913-20150221101637/@comment-6769189-20150301205657

Yes it isn't the eyes but there is no change in the chakra network. There is nothing to even imply that. Yes the chakra itself changes in the Sharingan, but the network stays the same. Sasuke is capable of using certain techniques without handsigns, but thats because he can apply shape and nature transformation without the use of the handsigns because he is so use to them, but that doesn't change the network.

Kakashi also had Uchiha chakra because he had Obitos eye.