Mercon vs Mercon V? - F150online Forums


Mercon vs Mercon V?

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  #1  
Old 11-17-2011, 12:59 AM
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Mercon vs Mercon V?

Hey everyone. I have a 4r70w tranny and have always used Mecron because thats what was the factory recomendation. I looked on here and everyone is saying go with Mercon V and was wondering is there a reason why? Am I hurting my tranny with just Mecron? Thanks on advance.
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Old 11-17-2011, 01:07 AM
MLD
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http://www.tccoa.com/articles/tranny/merconv.html

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For the start; Mercon V is not the same as Dexron III .

'96 and up T-Birds & Cougars with the 4R70W use Mercon V. It can be used in the '94-'95 cars, but it is not recommended by Ford. Mercon-V is a semi-synthetic ATF, introduced in 1997 for use in vehicles equipped with the 4R44E or 5R55E transmissions. The '98 model year 4R70W transmission, AX4S and AX4N transaxles use Mercon-V.

TSB-98-8-8 states: "Mercon-V is not interchangeable with the current Mercon service fluids. Using the incorrect fluid may cause transmission or translate concerns."

When asked why? Ford responded, "The synthetics work their way past seals and cause leaks and/or durability concerns". "The 1998 transmission seals are updated to prevent these problems" - Dayton Ford Service Technician.

The Shudder problem [TSB 95-23-4] is solved and your driveway will be dry as well. The synthetics actually prevent the ATF from flashing [burning] and this heat is what causes the TC to shudder. It's more shudder resistant because among things, it does not contain ash. If you really want to eliminate the shudder, install a new stall speed convertor one with a larger pump.

Aside from this, it's wear properties are much better than other versions. It can stand up to temperature better (and if you ever looked at the trans temp a t-bird runs, God help it).

It has a downside, which seems small, but when you make 1.5 million trans's a year it's big. It is a pretty big skin irratant. If you change your own fluid, or work with, wear laytex gloves. Some people react to it, and some don't. No reason for you to take any chances. A-Train
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Old 11-17-2011, 01:48 AM
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What if I have the 97 version of 4r70w? Should I stick with mercon?
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Old 11-17-2011, 06:37 AM
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I had to have my tc changed ( it was cracked) and the transmission guy
replaced my fluid with mercon v said it was better . No problems since.
I have a 97 also.
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Old 11-17-2011, 07:44 AM
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Sigh....


Ford discontinued Mercon several years ago.

The current formulation of Mercon V is recommended by Ford for *ALL* applications that previously specified Mercon.
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Old 11-17-2011, 09:03 AM
glc
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MLD, your info is over 10 years old. The current recommendation is as per what projectSHO89 has said. Do not put Dexron/Mercon or "universal" fluid into *ANY* 4R70W, use Mercon V.
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Old 11-17-2011, 09:09 AM
MLD
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http://www.fcsdchemicalsandlubricant...roduct=MERCONŽ V Automatic Transmission and Power Steering Fluid&category=Transmission Fluid

Above is the link. In 2009 it was reformulated to go retro.

You might want to stay away from other "off" brands of fluid though, like the ones you find at wally mart.

Interesting: Even Castrol Mercon V had an issue with torque converter shudder several years ago. They've reformulated since.
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Old 11-17-2011, 01:11 PM
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Quote:
Originally Posted by Armoredcorpse1 View Post
What if I have the 97 version of 4r70w? Should I stick with mercon?
Mercon V
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  #9  
Old 11-21-2011, 04:29 AM
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Okay thanks guys. Im gonna go with the mercon V then.
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