Vehicle is a 2013 Toyota FJ Cruiser with manual transmission and torsen center diff. Changed to this all around (front, rear, and center diffs) as well as the transmission. I noticed an immediate improvement in shifting quality and less noise, plus I got a general impression of less rolling resistance, as the vehicle seems to coast more easily. Maybe it's a placebo effect, but it also seems to be accelerating fractionally more quickly as well. My overall impression is very positive.