Provided you have the stock diff cover, if you have a after market cover most will have the hole raised up so you can get the right amount in even when you have rotated the rear end when installing a CV drive shaft. Make sure you use the amount specified by the FSM for your model rear end if that is the case.
My Jeep is NOT an suv and Your suv is NOT a Jeep
I am going to look at a Jeep in the next state over from me. I see what looked like pinion leaks on front and back axles. My question is what is the size of the thread insert to check the oil level? It is a 04 Wrangler Unlimited (D44 on rear and D30? in front). If I buy, its a hell of a trek back home and I want to make sure the diff's have fluid.