Just a thought......... I don't know if this applies to your mog as well? On my 404 I had to remove the top plate to sort a selector...... I made the big mistake of doing this on a slightly uphill piece of ground.
Everything was fine until I came to put the selector plate back on? I found that I could set up all the gears ready to receive the selectors and as I put the plate in all the gears had slid back because the nose was up!!
I eventually managed to jack up the back and get it level - but how I wished I had thought of the slope problem first!!
Also 404 owners....... when I was a Mog virgin, I believed the helmets on the internet that said if you remove the interlock on the reverse lever - you can get reverse in high range too! The pratt even gave a "how to" - believe me it is complete and utter nonsense and if I can save just one person from all that work for nothing - GOOD!
The reverse gear is only available through the low ratio shaft and anyone who tells you different is full of ............!