right, i think my diff was not locking out right as it only spins the right wheel even in a straight line from a bog under full throttle, so i jacked it up and tried spinning the wheels. before when i first put it in they both locked together an spun forwards together like it should, but now if i spin one the other stays still and the lsd makes a grinding noise. is this the friction plates/cone that have gone and can i fix them?? is there any reason for this because its only been in 2000 miles so not happy about it, could it be due to the oil i have used ??

thanks all