I cannot find a quality 90w or a 75-140w synthetic gear oil locally (shipping too expensive). I do not tow or have the tow package. I can find Royal Purple 85-140w synthetic gear oil. Can anyone see any issues?
Aloha

Aloha! [Nice place to visit]

You can run Royal Purple until you can find a shop that carries something better. Royal purple is decent stuff, but recent testing [Q the amsoil people] indicates that the protection isn't as nice.

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02 Liberty Limited
Silver Outside & Taupe Inside
Heated Seats, Sunroof & Infinity speakers
USA Spec I-Pod adaptor, Mopar Sub, Garmin GPS
Tow Package, Select-Trac
Rock Rails, Tow Hooks

You would be better off buying Mobil 1 Gear oil, Castrol Syntec gear oil or Redline over the RP if you can get them. There is a dealer in HI for Amsoil but not sure if you are on the same Island. (so there is the shipping again)

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99 TJ
71 C101
04 KJ
03 SFA KJ Sport
LOST JEEPS So-Cal

I would prefer Redline or Amsoil, sometimes living on a rock in a pond has it's disadvantages.

The Mobil 1 and even GM synthetic tested better than the Redline for the gear oils.

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99 TJ
71 C101
04 KJ
03 SFA KJ Sport
LOST JEEPS So-Cal