Doctor Diff's 8 3/4" Helical Gear Sure-Grip ("Sure-Trac") LSD

I have the strange version in the S60 in the Demon. Big block auto car. Turning 28-12/15 Sportsman S/R’s. It’s smooth and no noise when turning etc. But when you mash it both tires turn immediately. I have abused it from time to time. Doesn’t have to engage and so on. With that being said Cass doesn’t sell, in my opinion, anything that’s inferior. On top of that he’s excellent to deal with. If I had an 8 3/4 I would not have any issue running one. Call and talk to him.