1999 f150 58k


Getting ready to change the transfer case fluid and I was wondering what you personally use? I prefer synthetic and Mobil 1 but I wanted to poll the masses first.

 

Do not use Mercon V in it. Use Mercon III.

 

The cheapest stuff on the shelf... Probably Walmart Super Tech labeled ATF

 

so folks are still using atf instead of the transfer case fluid?

 

I used this
https://www.valvoline.com/our-produc...fer-case-fluid


full synthetic and meets the Ford spec

 

this guy is your friend

 

Why not XL-12. Ford transfer case fluid. Just bought 3 quarts from my local ford dealer today. 7.37 per quart.

 

its an equivalent to the XL-12 according to the bottle and it was local at advanced auto

 

Well.... Crap! My xfer case input seal was (is, maybe, but the trans level is still fine after 7K miles?) allowing trans fluid into the transfer case, so it was over-full with Mercon V. Guess I need to do something about that.

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