Reply #3 Posted at Tue Mar 26 22:29:07 2013
I take it that you are working on the rear differential.
On other diffs I have used a dial gauge but feeler gauges may be an option if you can arrange something to measure against like an adjustable stop held in place with a magnet.
A rough guide may be that it can be turned with slight resistance but not tight while no end play is able to be felt.
Are they new bearings or existing.