Sorry, I thought the Service Manual had a good picture of what the inside of a Traclok diff looks like but there is only a small diagram that shows the position of the clutches.
I would suggest you replace the oil in any case which means removing the diff cover. Then have a look for the clutches with reference to the diagrams in the Service Manual....this will tell you if this is a Trackloc or not.
Then use a good RTV Silicone to seal the cover, allow the bead of RTV to semi-harden while lightly tightening the bolts then tighten the bolts correctly according to the instructions on your particular brand of RTV.
Then if you have determined that you do have a Traclock, pour in one small container of Mopar Friction Modifier and then 2 litres of oil....I used Castrol 75W90 after doing a lot of reading up on the subject.
The Service manual then states...for a Trackloc....that you must get the Jeep to do 8 or ten slow figure 8 turns to get the oil spread properly in the clutches.