Changing differential fluid?

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340wedge

340wedge

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Has anyone replaced their 8 3/4 rear end fluid and if so how did you do it and what fluid is recommended? Thank you.
 
Read the book. RTFM. Go to MyMopar and download a free service manual. Some of them there are so because of guys right here.

Does it have limited slip?

If not I'd just run to the "parts store" and buy some multigrade gear lube
 
Flush it, don't just drain it after you drill and tap for 1/8" pipe plug. Then 2 qts of 80/90 gear lube and sure grip additive if it's a positraction diff. That's for the 8 3/4 . O'Reilly Auto has the additive.
 
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