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Transfer case fluid - BW 48-12

dork17

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Couldn't find a succinct answer, has anyone found a suitable fluid for the 48-12 (non auto) transfer case? Aside from Mopar fluid because I have no immediate access to it. Found a few posts suggesting ATF4 fluid. Anyone been using a Mopar alternative?
 
Thanks. Worth mentioning that the dealership near me wants $85 PER quart for the Mopar fluid. (In Canadian dollarydoos but still, yikes!)
I never use OEM fluids, when other name brands are just as good. Save money when you can. I've used Valvoline in previous vehicles with no issues ( Jeeps/ RAM )

Can also look at AMSOIL
 

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