I had installed on my TTZ barely increased diff noises for me at the time. Almost unnoticeable. Probably something else binding or in contact with the subframe that wasn't previously.
1993 Nissan 300ZX Slicktop 1992 Nissan Skyline GT-R Gunmetal Grey - Long Live the Z and Godzirra! - "Love cars. Love people. Love life." - Mr. K.