First off everybody, - I passed on duff gen.. the diff is indeed a 7HA, with all the underbody sealant goop stuck in there, the H looked like an N.
Sorry.
Richard Aus - The U bolts look o.k. No movement and all intact.
I'm ordering a complete set of bearings and seals for all 4 wheels from Chris van Wyk - at least this will exclude one possible source of noise.
One further question - where is the diff ratio stamped? The supplier of the bearings needs to know whether its 3.31 or 3.58 apparently the bearings are different.
