Mercon Transmission Fluid - Ford Truck Enthusiasts Forums



1999 to 2016 Super Duty 1999 to 2016 Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines

Mercon Transmission Fluid

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 11-11-2005, 08:07 PM
v10kenj v10kenj is offline
Senior User
Thread Starter
 
Join Date: May 2003
Location: Austin, TX
Posts: 134
v10kenj is starting off with a positive reputation.
Mercon Transmission Fluid

I just had a 30,000 service done at the local ford dealership, which included an automatic transmission flush and fluid change. When I got the reciept it listed mercon 5 for the new transmission fluid, even though the manual and dipstick say to only use mercon, not mercon 5 or mercon sp. The service manager said that Ford is now recommending mercon 5 because it is a better product, but he didn't have anything (like a TSB) to back this up with. I looked back at several older posts and someone had a link to a FORD website where it specifically says to only use only mercon for my year and transmission type.

I have the 4r100 4 speed automatic transmission in a 2003 v10 2wd. I probably drove about 60 miles with the mercon 5 fluid, and I'm making the dealer put the correct fluid back in tomorrow. Does anyone know if any damage could occur that quickly? Thank you.
Reply With Quote
  #2  
Old 11-11-2005, 08:29 PM
FortyFords's Avatar
FortyFords FortyFords is offline
Post Fiend
 
Join Date: Jan 2002
Location: USA
Posts: 5,859
FortyFords is gaining momentum as a positive member of FTE.
Well the latest TSB I have is #01-15-7 it is a tsb that states do not mix mercon 5 with any other type fluid . That includes mercon 3 or mercon.
The reason is that the seals can start to swell and leak and also cause driveability and longevity issues with the tranny.
I would get it in writing that they made a mistake and will repair the tranny in the future if you have issues later on .
This is of course that they don't have a later tsb to back the service guys statement.
Just my $.02
Rich
Reply With Quote
  #3  
Old 11-11-2005, 10:00 PM
99f350sd 99f350sd is online now
Post Fiend
 
Join Date: May 2003
Location: Lyndonville, Vermont
Posts: 8,147
99f350sd has a good reputation on FTE.99f350sd has a good reputation on FTE.
Yes get everything in writting. also get the TSB in your hands . Don't let them go against your owners manual without taking full responsibility..Maybe he's right but maybe not esp since we didn't hear about it here.. Let us know


Dick
Reply With Quote
  #4  
Old 11-11-2005, 10:54 PM
rwilimo rwilimo is offline
Elder User
 
Join Date: Aug 2005
Location: NJ
Posts: 812
rwilimo is starting off with a positive reputation.
The service manager is partially correct, Ford did recommend switching some transmissions over to Mercon V to help with torque convertor shudders, however this does NOT include the Superdutys. I did a lot of searching on this topic a few months ago and the concusses seemed to be that Mercon V is not good for this model transmission. Do a search on this forum, if I remember correctly someone else had the same problem with a dealer. When he confronted them they towed it back to the dealer and changed the fluid back to Mercon.
Reply With Quote
  #5  
Old 11-11-2005, 11:01 PM
v10kenj v10kenj is offline
Senior User
Thread Starter
 
Join Date: May 2003
Location: Austin, TX
Posts: 134
v10kenj is starting off with a positive reputation.
I did see that post. They're going to change it back in the morning, although I think the dealer still thinks he did the right thing. He said he's been using the mercon 5 for the last several years in the 4r100. I hope there hasn't been any damage. I'm going to try to get them to extend the warranty on the transmission. Thanks for all the replies.
Reply With Quote
  #6  
Old 11-11-2005, 11:02 PM
ford390gashog's Avatar
ford390gashog ford390gashog is offline
Post Fiend
 
Join Date: Jan 2004
Location: Brentwood,CA
Posts: 14,854
ford390gashog is a name known to allford390gashog is a name known to allford390gashog is a name known to allford390gashog is a name known to allford390gashog is a name known to allford390gashog is a name known to all
mercon 5 will destroy a 4r100 transmission.
Reply With Quote
  #7  
Old 11-12-2005, 12:11 AM
wlihntr's Avatar
wlihntr wlihntr is offline
Postmaster
 
Join Date: Jan 2004
Location: colorado
Posts: 4,758
wlihntr has a good reputation on FTE.wlihntr has a good reputation on FTE.
Quote:
Originally Posted by ford390gashog
mercon 5 will destroy a 4r100 transmission.
yeper. make sure they flush it out good
Reply With Quote
  #8  
Old 11-12-2005, 09:58 AM
Richard4447 Richard4447 is offline
Senior User
 
Join Date: Oct 2003
Posts: 101
Richard4447 is starting off with a positive reputation.
I was told by my dealer to use Mercon V. Three guys behind the counter said to go ahead and use V. I called another and he said NOT to use V and that in fact the XT-2-QDX is Mercon III. I am so confused. I also can NOT find straight MERCON and most of the fluids have multiple spec suchs as Mercon/Mercon V or Mercon/Mercon III.
Reply With Quote
  #9  
Old 11-12-2005, 10:32 AM
Casey Casey is offline
Posting Guru
 
Join Date: Jul 2003
Posts: 2,210
Casey is gaining momentum as a positive member of FTE.
There is no such thing as MERCON III. There is DEXRON III/MERCON, and that's what the 4R100 uses. DEXRON III and MERCON are just about identical, so one fluid meets both specs. Don't use MERCON V or any fluid that has both MERCON and MERCON V.
Reply With Quote
  #10  
Old 11-12-2005, 12:54 PM
v10kenj v10kenj is offline
Senior User
Thread Starter
 
Join Date: May 2003
Location: Austin, TX
Posts: 134
v10kenj is starting off with a positive reputation.
I found this link from an older post. It was very helpful. When I showed it to the dealer, he was speechless.
http://www.fcsdchemicalsandlubricant...ickref-atf.pdf
Reply With Quote
  #11  
Old 11-12-2005, 12:55 PM
v10kenj v10kenj is offline
Senior User
Thread Starter
 
Join Date: May 2003
Location: Austin, TX
Posts: 134
v10kenj is starting off with a positive reputation.
Reply With Quote
  #12  
Old 11-12-2005, 06:36 PM
boxcar1974's Avatar
boxcar1974 boxcar1974 is offline
Postmaster
 
Join Date: Dec 2003
Location: Massachusetts
Posts: 3,133
boxcar1974 has a good reputation on FTE.boxcar1974 has a good reputation on FTE.
Back in December of last year, I had my 30K service at the dealer. They did a complete flush and drain. They filled with 12 qts of MERCON V. I have put 22K since then and had ZERO issues. Until this tread, I never realized they used anything different than what they were supposed to.
Reply With Quote
  #13  
Old 11-12-2005, 06:55 PM
Rugby3's Avatar
Rugby3 Rugby3 is offline
Elder User
 
Join Date: Mar 2003
Location: Farms of Duplin County
Posts: 616
Rugby3 is starting off with a positive reputation.
Quote:
Originally Posted by boxcar1974
Back in December of last year, I had my 30K service at the dealer. They did a complete flush and drain. They filled with 12 qts of MERCON V. I have put 22K since then and had ZERO issues. Until this tread, I never realized they used anything different than what they were supposed to.
After reading through this thread I checked what the dealer put in mine when they flushed the tranny. They filled it with the Mercon V as well. I only have about 3k on it since they did the flush and haven't noticed any issues either.
I've got an 01 V-10.
Reply With Quote
  #14  
Old 11-12-2005, 08:16 PM
Richard4447 Richard4447 is offline
Senior User
 
Join Date: Oct 2003
Posts: 101
Richard4447 is starting off with a positive reputation.
Quote:
Originally Posted by Casey
There is no such thing as MERCON III. There is DEXRON III/MERCON, and that's what the 4R100 uses. DEXRON III and MERCON are just about identical, so one fluid meets both specs. Don't use MERCON V or any fluid that has both MERCON and MERCON V.
You are right, I messed up on the 'Dexron III' vs just 'Mercon III'. Just repeating what the parts department advised me.
oops

On the flip side with the PDF listed above, it clearly states,
"Use of a transmission fluid that indicates dual usage (MERCONŽ, MERCONŽ SP OR MERCONŽ V) in an automatic transmission application requiring MERCONŽ may cause transmission damage. Use of any fluid other then the recommended fluid may cause transmission damage."

Does this mean MERCON and DEXRON III designations as well since I guess it is a dual usage? I don't see anywhere in the PDF of any mention of Dexron III.

EDIT: I did a little research just now. I am not a mechanic which is why I did not know this but DEXRON III is a GM (chevrolet) specification whereas Mercon is the Ford spec. I couldn't find straight MERCON. I thought Dexron III/Mercon was a dual usage fluid for Ford. This is why I steered away due to the PDF listing of "Use of a transmission fluid that indicates dual usage (MERCONŽ, MERCONŽ SP OR MERCONŽ V) in an automatic ransmission application requiring MERCONŽ may cause transmission damage." where I read in this website elsewhere as well.

Last edited by Richard4447; 11-12-2005 at 08:41 PM.
Reply With Quote
  #15  
Old 11-12-2005, 09:31 PM
v10kenj v10kenj is offline
Senior User
Thread Starter
 
Join Date: May 2003
Location: Austin, TX
Posts: 134
v10kenj is starting off with a positive reputation.
I had the dealer put the mercon (now called mercon 3) back into my transmission today. The part number on the mecon 3 quart was the same one listed on the PDF for regular mercon. It might be my imagination, but the shifts feel a little better (firmer) now than when I was running on mercon 5.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Mercon help powerstroker100 1987 - 1996 F150 & Larger F-Series Trucks 4 04-15-2015 10:52 PM
Mercon V vs. Mercon III AmmoDawg Expedition & Navigator 2 01-08-2013 10:26 AM
Mercon III vs Mercon V UNTAMND 1999 - 2003 7.3L Power Stroke Diesel 18 08-31-2010 12:53 PM
Transfer case fluid type bigred66 1999 to 2016 Super Duty 10 08-21-2010 04:38 AM
E40D Fluid? 50stang Oil & Lubrication 11 02-21-2005 08:43 AM


Go Back   Ford Truck Enthusiasts Forums >

Tags
4r100, 4r1004sp, 5, atf, dexron, fluid, ford, leak, mercon, mix, proper, specifications, tranny, trans, transmission

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 11:53 PM.