I changed the front and rear diff oils today, using epx80/90. last weekend i got stuck in a boghole (with no diff breathers)and my rear diff has been noisey this week


Well the front diff took 1.9-2litres. the rear i put approx 1.6litres in. reason is: the filler bolt was stripped and i ended up filling the diff through the breather hole (almost 1 hour later!). So since i wasnt able to see the oil overflow out the filler hole, i'm not sure i've put the right amount back in. It drained out about 1.6litres of browny/black oil+metallic paste+mud.
The diff is noisey still, so im Hoping it's maybe low on oil..any ideas?
If i've wrecked this diff its getting welded next week
