Thanks for the info,
Was really stiff but now seems ok and when I tighten the two halves of the box can hear the spring washers "groan" as they are squashed flat!
Am using the original box but with the diff from an RST, swopped one bearing and race from teh other box (save removing it from teh diff) and the other end is a new bearing and race so probably some difference, now cant get it to select reverse! So have to take it all apart again, probably something silly overlooked.
Did you use the moly paste during reassembly???
Cheers
marvin