finally got my 1.8 box changed , put in a close ratio as opposed to the wide one , much better in mid range and picks up better in 3rd 4th and 5th gears , downside tho , when sitting at 70 the revs are at 3k (was 2.5k with old box)
worse mpg I guess but what you lose in the swings you gain in the roundabouts eh ?
best of all no more noise from the diff ,
happy bunny now