The Clicking IS the diff gears slipping. I had this on mine, sounds terrible and really affects the way it goes. Mine did it but there too was no sign of any wear but it won't stay that way.
You need to strip the Diff, and just mount two small shims underneath the pin (Basically push the two large gears towards the centre of the diff) if that makes sense... (Basically just make the mesh tighter)
AE actually released a shim kit for the diff on the SC10 as it definitely needs it after 1-2 runs with the truck.
I did mine as per instructions from Lee and it was absolutely perfect for the 3 times i ran it afterwards - no clicking and it drove perfectly.
|