6 speed fluid

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Oct 14, 2007 | 11:35 AM

cobarjet

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6 speed fluid

Need to change oli in the tranny looking for input on what fluid/oil to use in it

Oct 14, 2007 | 11:47 AM

F350-6

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From: Texas

I've never had any trouble with the recommended ATF. Some prefer a synthetic. Royal Purple is a name that gets tossed around a lot.

Oct 15, 2007 | 11:08 AM

Fat Diesel

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From: Morgan Hill, CA

Mobil 1 Syn ATF is what i've put in the last three times. I've even tortured it to 235* without an issue.

Oct 15, 2007 | 11:34 AM

cgl

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From: NorCal

Mobil 1 Synthetic ATF gets my vote.

Oct 15, 2007 | 03:55 PM

jtharvey

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From: Columbia, MO

The manual tranmissions in these trucks use ATF? Seems like that would be too thin for a manual.

Oct 15, 2007 | 04:09 PM

F350-6

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From: Texas

Quote:

Originally Posted by jtharvey

The manual tranmissions in these trucks use ATF? Seems like that would be too thin for a manual.

You would think so but they've been doing this for several years. It actually holds up well.

Oct 15, 2007 | 04:19 PM

jtharvey

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From: Columbia, MO

Do you guys know of the new '08 trucks have the same manual trans in them and call for the same fluid? I've got a friend that owns one and wants to change his fluid, but the owner's manual only states Motorcraft Manual Transmission Fluid. Is this just rebadged ATF? Seems it would be easier for them to just spec ATF in the manual.

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Oct 17, 2007 | 09:47 AM

cgl

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From: NorCal

Quote:

Originally Posted by jtharvey

My 02 manual uses ATF. The 08 specs:
Manual transmission fluid
5.8 quarts (5.5L) Motorcraft Full Synthetic Manual Transmission Fluid
Ford part number : XT-M5-QM / WSS-M2C200–C

What the difference is, I don't know.

Oct 17, 2007 | 10:55 AM

#10

03_PSD

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how much fluid do the zf6's hold?

Oct 17, 2007 | 11:26 AM

#11

Izzy351

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From: Dallas-Ft. Worth

Quote:

Originally Posted by F350-6

You would think so but they've been doing this for several years. It actually holds up well.

Yep -- my '84 Mustang's T5 had ATF in it. I converted to 75W-90 syn gear oil, then broke it. Twice. It wasn't the oil's fault though. I was racing it both times --2nd gear in those things were very fragile. That's why I swapped it to a C6 with the bored 351W...