not voiding warranty

any of you guys ever dealt with warranty issues? i'm looking to add limited slip rear diff. and while i know my warranty won't cover it, will it void anything else?...getting a straight answer out of the dealer is sloooooowwwwwwwww.

any help is appreciated

The Only Affected Parts Would Be Those That You Replace. In The Event That Something Should Go Wrong It Would Only Be An Issue If Your "new " Parts Or Installation Error Caused The Problem