what fluid do use in transfer case?
Cargo Master
Joined: May 2009
Posts: 2,587
Likes: 47
From: Eagle River, AK
I am pretty sure I put synthetic Mercon equivalent in a ZF5 Transmission and BW1356 Transfer Case in my 89 F350.
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Fleet Mechanic
Joined: Jul 2004
Posts: 1,552
Likes: 0
From: va
It was a video from a Ford tech he said not to use Mercon V in an older transfer case. He said it states it on the back of the bottles. They were told not to use it in older trucks anymore. He never said what they use instead but said they have bottles of transfer case fluid there on the shelves at the dealers. lol ???
Elder User
Joined: Jul 2011
Posts: 793
Likes: 2
From: Vernon, BC
Mercon is what the owners manuals call for in the transfer case so Mercon or equivalent would work.
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Ford doesn't license the Mercon name anymore, but every auto parts store and gas station has Mercon. It's the exact same formulation but isn't licensed by Ford. Don't screw around with getting universal atf and just buy the Mercon.
