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Old 08-20-2010, 01:54 PM
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Transfer case fluid type

I've got a 06' 4x4 with the automatic transmission and diesel engine. I went to ford today and bought some fluid for the transfer case. The guy at the counter gave me Motorcraft Mercon V fluid.

When looking online I found a video of a guy changing the transfercase fluid on a 6.0 and he was using "Mercon/Dexron III".

From a previous issue I had I know that Mercon V and Mercon/Dexron III are completly different fluids.

On the back of the Mercon V bottles that the ford guy sold my it says "Do Not Use In Transfer Cases."

Other forum posts I read just say to user Ford ATF.


So my question is, do i have the correct fluid ( Mercon V) for my transfer case?
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Old 08-20-2010, 02:06 PM
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Mercon III and Mercon V are completely different. As for transmissions, you can use the newer fluid in the older trucks, but not the older fluid in the newer trucks. If the bottles state to not use in transfer cases, I would return them and get the Mercon III or equivalent. I have no idea why III ATF is okay and V ATF is not. I changed the fluid in mine with Valvoline MaxLife Mercon/Dexron ATF.
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Old 08-20-2010, 03:00 PM
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http://www.ford-trucks.com/forums/89...ase-fluid.html
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Old 08-20-2010, 03:04 PM
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Thanks for the responses guys. Where would we all be without forums?
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Old 08-20-2010, 05:01 PM
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i just changed my 04's with mobil 1 atf truck seems smoother for some reason also. do know with 80k mine was real dirty so looks like once a year will be for now on
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Old 08-20-2010, 07:30 PM
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I went through the same thing a few weeks ago. Went to my dealers parts counter and asked for 2 qts. transfer case fluid, Parts guy comes back with Mercon V fluid. So i tell the parts guy that i need transfer case fluid not Mercon V fluid. The parts guy says Mercon V is the correct fluid. Just then the tech that did my studs last month walks up, So i ask him if the Mercon V is correct, He said I'll check he comes back with a notebook computer looks it up on fords network and guess what, The correct fluid is transfer case fluid. I'm Not sure whats the difference in the fluids.

The parts guy didn't know ford had labeled transfer case fluid.
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Old 08-20-2010, 07:38 PM
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Quote:
Originally Posted by Ricson View Post
The parts guy didn't know ford had labeled transfer case fluid.
That's the bad part. They should be trained to know. Afterall, it's not like you asked him about Chevy fluid for the transfer case.
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Old 08-20-2010, 08:12 PM
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The parts guy got a little upset and said he and can't access the same info. the techs can.
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Old 08-20-2010, 08:16 PM
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Quote:
Originally Posted by Ricson View Post
The parts guy got a little upset and said he and can't access the same info. the techs can.

Something's really wrong if the parts guy can't look up what fluid the transfer case takes.

It's not like you asked him for front end alignment specs or the backlash on the rear diff.
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Old 08-20-2010, 08:34 PM
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He did look it up and it says Mercon witch my book says too. But Ford doesn't have Mercon label any more so he came back with Mercon V. The tech was able to access the part number for the fluid witch was labeled as transfer case fluid, Witch i believe is reg old Mercon.
The parts guy said he couldn't access the same info. the tech did.
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Old 08-21-2010, 03:38 AM
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I have a 2000 Excursion V10. I put Redline D4 ATF in my transfer case 7 years ago and change it every 50K miles. Before, when I put it in 4x4, the transfer case would make a slight woo'ing noise since it was new. The same with my old suburban before that. When I put the Redline D4, in just the first mile it was so quiet I couldn't tell if it was in 4x4. Even now with 205K miles it still runs just as quiet. Redline is a little expensive, but in my opinion $22 over the course of 2-3 years is chump change. I highly recommend it.
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Old 08-21-2010, 03:38 AM
 
 
 
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