Originally Posted by RogerHewson
If you pull the diffs apart, you can jam an extra spider gear in between two of the existing spiders and lock it up 100%. You do have to shave some material off the inside of the diff housing to get it to fit. It won't have any effect on the strength of the diff or how it works if you pull the gear out.
By doing that you are going to create additional vibrations as the diff will be off balance!
Best is to open up as stated above and clean out diff grease then with all but the top gear installed, pour in some hot glue and assemble quickly. Will stay locked till you decide to take it apart