how to check if diff are still LSD or not ?

[Jason]

ok.. let me explains some more

when I lift the truck in the air and turn one wheel by hand the other wheel dont move look like it need more pressure..

when I lift the truck in the air again and turn the spur by hand the both wheel turn in the same way..

when I lift the truck in the air and push some gas throttle the both wheel turn the same way even at low speed..

so my diff are LSD right ?

[Jason]