dart65 said

Thank you for all the feedback, I will start with these -Castrol 80w-90 and Motocraft -XL3. I may experiment with Redline if there is any noise.
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Does anyone know of a thread with 8.25 differential DIY maintenance? I found the following link on this forum but am unsure if this is for vintage differentials or new Jeep 8.25".
[URL]https://www.mopar1.us/axle/sm03b.html#SGFLUID[/URL]

It seems fairly straight forward and please correct me if I am wrong:

1. Jack the car up on jack stands braced against the rear frame letting the rear wheels hang down and use front wheel chocks
2. Remove the 10 bolts out of the differential cover
3. Remove the differential cover and let the oil drain
4. Ensure the differential case hole is facing down if not the engine can be used to turn the diff until it is facing down and drains
5. clean the cover mating surfaces with acetone or mineral spirits remove all old gasket.
6. ????use silicon gasket maker of Fel-Pro cardboard gasket with silicone?????
   1. which is better a carboard gasket or simply Permatex gasket maker??
   2. Or am I supposed to use carboard gasket with Permatex high-tack
7. reapply the differential cover
8. Lowe the vehicle to level ground
9. take the filler plug out
10. Fill with 2.2 quarts of gear oil +friction modifier
11. replaced the fill plug and drive away

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