does make yu wonder - dont it 
oh and the g/box and t/box oils desperatly need doing i should think. haha. never ending!
oh and never did do them swivels!
Nope thats a greese gun, the link I posted is a gearbox oil syringe , GOD send for filling up gearbox and tranny boxes
Best get back to the OPs subject ( pm me Thainy )
I have between an 8th & quarter turn of play in both my propshafts. How much should there be?