atomman
Club Member
I think, but not 100%, that the suretrac is a torque biasing type such as the quaife. Therefore doesn’t wears so bother to replace or adjust. The other type has clutch plates that do wear and will need adjusting.
Your right John, was developed for road cars and sort of fit and forget with no bits that wear and need replacing,
" The Suretrac falls into the TBD (torque biasing differential) category, which means technically its not a limited slip unit. Instead, it transfers torque to the wheel that has more load. However, it requires some load on both wheels in order to transfer the torque, otherwise a TBD will act as an open diff."
Some clever design going on inside of it .
A plate LSD can be set up to grab more or less and they do wear unlike the Suretrac
just had a look at the Quaife LSD and it looks like a Torsen LSD with screw gears in side#
https://shop.quaife.co.uk/nissan-240z-110mm-c-w-quaife-atb-helical-lsd-differential