Use any good quality motor oil- your choice of brand, detergent or not doesn't matter. Match the viscosity to the ambient temperature just as you would with the engine. I use 10w-40 multi-grade synthetics in mine, they very seldom experience extremely cold weather. If it's had gear lube in it you need to get it out ASAP, the thickness tends to starve certain bearings. I would run something cheap for a few hundred miles, then change to whatever permanent lube you select, I might even repeat to make sure I got all the thick stuff cleaned out. If you change the lube at 30,000 mile intervals as you should then the synthetics may be an unnecessary added expense, but they certainly won't hurt.
_________________ '78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78. '87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.
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