Transmission Fluid

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Jan 15, 2004 | 01:57 PM

#31

Bob Ayers

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From: Durham, NC

Quote:

Originally posted by pcorbin
Gentlemen -

This is an informative thread. My son-in-law is a certified GM mechanic and is about to service my auto tranny on my 01 F250 5.4 for the first time at 70K miles. The book says it holds 17.7 qts of Mercon ATF, but my son-in-law says he will only need maybe half of that to service it. I just bought Mobil ATF (not synthetic) that is advertised as meeting both GM fluid requirements and Ford Mercon. Being mindful of comments in this thread critical of this hybrid fluid, it the problem (whatever it is) made worse by mixing the hybrid with what is left in my tranny? So far, the tranny has been fine except for an occasional shudder on upshift that sounds like I'm running over center line markers.

It sounds like your son-in-law is just planning on dropping the pan. You really should do a full flush, replacing the fluid in the torque converter also.....And if your owner's manual calls out Mercon, just use Mercon, not a "generic" like it sounds like you bought......

Jan 30, 2004 | 04:48 PM

#32

khmorse

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Joined: Jan 2003

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From: Chesapeake, VA

I just changed my ATF w/Mobil 1, which is Mercon. It was not that hard to drain both the torque converter and drop the transmission pan. This took about 15 1/2 qts to refill my Expedition. My manual states it holds approx. 16 qts. So it was a pretty thorough change. The only place I could find Mobil 1 ATF locally was at Autozone.

Now, FYI, while at Autozone, I also saw that they carried Valvoline synthetic ATF, which was Mercon V.

Jan 30, 2004 | 04:54 PM

#33

Bob Ayers

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Joined: Jan 2003

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From: Durham, NC

Quote:

Originally posted by khmorse
I just changed my ATF w/Mobil 1, which is Mercon. It was not that hard to drain both the torque converter and drop the transmission pan. This took about 15 1/2 qts to refill my Expedition. My manual states it holds approx. 16 qts. So it was a pretty thorough change. The only place I could find Mobil 1 ATF locally was at Autozone.

Now, FYI, while at Autozone, I also saw that they carried Valvoline synthetic ATF, which was Mercon V.

Mobil 1 ATF IS NOT Mercon!!!!!

Check out this TSB for the CORRECT ATF to use:

http://www.ofoc.ca/garage/TSB%2001-15-7.pdf

Last edited by Bob Ayers; Jan 30, 2004 at 04:58 PM.

Jan 30, 2004 | 05:19 PM

#34

khmorse

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Joined: Jan 2003

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From: Chesapeake, VA

From the Mobil 1 website:

Applications

Mobil 1 Synthetic ATF is recommended for use in modern high performance automobiles, SUV's, SUT's, vans and other light trucks requiring Dexron III and Ford Mercon performance levels.

Specifications & Approvals

Mobil 1 Synthetic ATF has the following builder approvals:

Allison C-4
Ford Mercon
General Motors Dexron III

http://www.mobil.com/USA-English/Lub...ntheticATF.asp

Jan 30, 2004 | 05:27 PM

#35

Bob Ayers

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Joined: Jan 2003

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From: Durham, NC

Quote:

Originally posted by khmorse
From the Mobil 1 website:

Applications

Mobil 1 Synthetic ATF is recommended for use in modern high performance automobiles, SUV's, SUT's, vans and other light trucks requiring Dexron III and Ford Mercon performance levels.

Specifications & Approvals

Mobil 1 Synthetic ATF has the following builder approvals:

Allison C-4
Ford Mercon
General Motors Dexron III

http://www.mobil.com/USA-English/Lub...ntheticATF.asp

Ford is very explicit in NOT USING ATF that is dual purpose (Dexron and Mercon)

Jan 30, 2004 | 05:42 PM

#36

khmorse

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Joined: Jan 2003

Posts: 192

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From: Chesapeake, VA

From everything I have read, they are talking about dual purpose Mercon/Mercon V.

Unless you specifically buy Motorcraft, what other brand of Mercon ATF is not dual purpose w/Dexron?

I just went to the following websites, and all of the following brands are dual Mercon/Dexron:

Mobil
Mobil 1
Havoline
Valvoline
Quaker State
Pennzoil
Royal Purple
Castrol
Exxon
Shell
AdvanceAuto brand

Everyone had specific/different blends for Mercon/Dexron & Mercon V.

Last edited by khmorse; Jan 30, 2004 at 05:54 PM.

Jan 30, 2004 | 05:57 PM

#37

Bob Ayers

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Joined: Jan 2003

Posts: 4,417

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From: Durham, NC

I have to agree with you, only Mercon 5 is separate!!!!!

I just checked the Motorcraft website, and Motorcraft Mercon is
ALSO Dexron III!!!

http://www.motorcraft.com/standard.a...M=44&PageID=74

Last edited by Bob Ayers; Jan 30, 2004 at 06:05 PM.

Jan 30, 2004 | 06:06 PM

#38

khmorse

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Joined: Jan 2003

Posts: 192

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From: Chesapeake, VA

It's all good. The debate is fun. You got me thinking and I certainly wanted to make sure I did not add something I shouldn't have. I would have never gone to that many manufacturers looking if you had not questioned my post. I certainly know a little more now than I did a 1/2 hour ago.

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Jan 30, 2004 | 07:43 PM

#39

therion

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Joined: Jan 2004

Posts: 108

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From: Chicago, IL

Re: Transmission Fluid

Quote:

Originally posted by John with beastly 302
Hey,

So I'll be doing scheduled 20,000 mile Transmission fluid change in the sable soon. I'm Debating on what to use. I know chevron makes excellent products, How about there Dexron/Mercron Transmission Fluid Is it A group III Just asking for Some opinions and Facts.

Thanks

Oh ya Merry Christmas

I used Amsoils Synthetic ATF in my truck and it is definatly a very good ATF. Another good one is from synlube - www.synlube.com but more expensive. Shifts crisper and stronger than before. 100,000 mile drain intervals too. With this oil you tranny will definatly last 200k, provided you do not THRASH it on a day to day basis. If you want it to guarantee last past 250k you will need to install some sort of bypass filter on the tranny. Like a Frantz, then your tranny will last indefinitly!

Last edited by therion; Jan 30, 2004 at 07:46 PM.