Cat Sx diff giving me HELL

[Brooks]

Hi people

Just got the Cat up and running after waiting for all the parts, electrics etc. Striped and cleaned the both Diffs before running. Ran it in the house just to see if the Diffs and slipper are loose, very small area, only big enough for half throttle and brake, they were loose.Tightened the front and rear Diff perfect and the slipper. Tried it again and there was a rubbing noise/diff sliping sound. Thought it was the slipper. Had a look at the car and the front diff was just sliping, no Diff action at all. One minute is was fine then there was nothing, no Diff action on the front. The rear was perfect.

The only thing i hate about the Cat Sx are the Diffs. Have taken them apart so many times, follow the manual correctly and they still give me hell.

People please help

Cheers
Chris B