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Old 09-25-2008
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Oil change for differential?

How often you guys change your differential oil? what brand/type you use?

This is for '94 B2300 w/ 253K miles.
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Old 09-26-2008
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Put pan under differential cover, pull all the bolts off the cover except the top one, which will be only partially threaded on, screwdriver between the axle housing and the diff cover to pry it open to let the fluid drop into the pan, the top bolt is there to keep the pan from dropping and making a bigger mess, once drained removetop bolt and remove cover completely. Clean the housing and the cover mating surfaces. Once clean from all previous silocone, I use laquer thinner to clean the surfaces even more. Then glob on some new silocone, and put hte cover on, and tighten the bolts til their snug. Wait 20mins for silocone to harden, then fill through the fill hole on the front side of the pumpkin. Fill until fluid starts dribbling out of the fill hole. I like to 'overfill' by seeing if more fluid would go in, and it'll just dribble out. Put plug back in, done.

I run Royal Purple in mine, don't remember the weight though.
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Old 09-26-2008
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syn

Im going to change mine next week, any problems with synthetic?
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Old 09-26-2008
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no.
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Old 09-26-2008
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Note: take fill plug out before you drain, that way if its stuck, your diffy is still full and you can drive to get it out.
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Old 09-27-2008
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Icon7

I just changed the differential oil, and it turned out to be a pretty easy job. I pumped dirty oil out from the fill hole instead, and refilled it with regular conventional oil (80W90).
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