Is there a visible way o practical way to know yo have LSD??

[jondee86]

Hey Bastiaan

What you say is quite correct for a freshly built LSD. The preload of
the springs on the clutches should overcome the frictional drag in the
driveshaft and gearbox, allowing both wheels to turn together in the
same direction (with the car jacked up and both wheels off the ground).

However, on a well worn LSD the preload is much reduced, and may
not transmit enough torque to overcome the friction drag in the drive
train. In this case the driveshaft remains stationary, and the wheels turn
in opposite directions (as would happen with a non-LSD differential).

On my car this is exactly the situation with the OEM LSD at 140,000 km.

And to be clear, my comments relate only to the AE86 OEM LSD, where
the level of preload is low, and designed to improve the operation of the
differential, rather than transmit torque. Some aftermarket LSD's have
clutch packs with a much higher preload, and can be shimmed up until
they act almost like a welded diff

Cheers... jondee86