Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Super Duty & Heavy Duty
Sign in using an external account
Register Forgot Password?


Super Duty & Heavy Duty 1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines SPONSORED BY:




 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 01-19-2011, 02:49 PM
EMC V10 X's Avatar
EMC V10 X EMC V10 X is offline
Senior User
2001 Ford Excursion
 
Join Date: Oct 2010
Location: Pickerington
Posts: 160
EMC V10 X is starting off with a positive reputation.
Mercon/Dexron III vs. Mercon V....

I recently purchased a 2001 Excursion with a V-10. It has about 148,000 miles on it. I have searched nad read as much as I can on this and I am still . My owners manual specificily says:

MERCON and MERCON V type fluids are not interchangeable.
DO NOT mix MERCON and MERCON V. Use of a transmission
fluid that indicates dual usage (MERCON and MERCON V) in
an automatic transmission application requiring MERCON may
cause transmission damage. Use of any fluid other than the
recommended fluid may cause transmission damage.

I have put hundreds of thousands of miles on my vehicals following the owners manual direction. Yet I see people saying to ignore the manual and use Mercon V, and that the Mercon/Dexron III will damage my transmission. I am about to do a full fluid exchange and filter replacement (DIY found on FTE) Did the Mercon fluid all of a sudden go bad? The Mercon V become derated? I am quite confused.

I liken it to being told "dont drink drano" your entire life then one day "Drink drano and all your worries will go away!"

Will the Mercon/Dexron III actually damage my transmisson? Of is the Mercon V, just better?
[/size][/font][/size][/font]
__________________
2001 Ford Excursion 4x4 V-10
Reply With Quote
  #2 (permalink)  
Old 01-19-2011, 05:26 PM
SuperDutyScaler's Avatar
SuperDutyScaler SuperDutyScaler is offline
Postmaster
Garage is empty, add now
 
Join Date: Nov 2008
Posts: 4,663
SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.
my 04 reads the same thing, but apparently ford did away with regular mercon and now they say that mercon V is approved to use in older trucks. ive been changing my tranny fluid once a year since i bought it new with mercon V and 80k later im still good. i think i read a service bullinton somewhere on it also
__________________

2004 F-350, XLT, SC, SB, FX4, 5.4, 4R100 w/ .472 line mod valve & tweaked TransGo HD2 reprogramming kit, 4.30 gears w/ stock LS, zoo dad mod w/ STOCK intake, Gibson stainless headers, SPD y-pipe, 51509 cat, Borla 3" exhaust, 1" rear AAL, dually upper and lower overload spring, 08 diff cover, ProComp 22210 springs, more.....
1977 F150, stock with soon to be flat bed
Reply With Quote
  #3 (permalink)  
Old 01-19-2011, 05:28 PM
SuperDutyScaler's Avatar
SuperDutyScaler SuperDutyScaler is offline
Postmaster
Garage is empty, add now
 
Join Date: Nov 2008
Posts: 4,663
SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.SuperDutyScaler has a great reputation on FTE.
o and never use mercon/dexron mix EVER that will deffiently give you problems
__________________

2004 F-350, XLT, SC, SB, FX4, 5.4, 4R100 w/ .472 line mod valve & tweaked TransGo HD2 reprogramming kit, 4.30 gears w/ stock LS, zoo dad mod w/ STOCK intake, Gibson stainless headers, SPD y-pipe, 51509 cat, Borla 3" exhaust, 1" rear AAL, dually upper and lower overload spring, 08 diff cover, ProComp 22210 springs, more.....
1977 F150, stock with soon to be flat bed
Reply With Quote
  #4 (permalink)  
Old 01-19-2011, 05:40 PM
Mark Kovalsky's Avatar
Mark Kovalsky Mark Kovalsky is offline
Post Fiend
Garage is empty, add now
 
Join Date: Aug 1999
Location: SE Florida
Posts: 10,255
Mark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputation
So much misinformation out there...

When your truck was built MERCON was the recommended fluid. That's what the transmission was built with at the factory. MERCON and DEXRON III are so similar that just about any fluid that meets one of the specs also meets the other. So any fluid that is MERCON/DEXRON III will work just fine.

In 2006(?) Ford eliminated MERCON and GM eliminated DEXRON III. Ford respec'd MERCON V so that it is compatible with older transmissions that were designed for MERCON. So now MERCON V is the recommended fluid for your transmission.

In reality and fluid that is MERCON, MERCON/DEXRON III, or MERCON V will work fine. My first choice would be MERCON V because it is a better fluid.
__________________
Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
Reply With Quote
  #5 (permalink)  
Old 01-19-2011, 08:43 PM
EMC V10 X's Avatar
EMC V10 X EMC V10 X is offline
Senior User
2001 Ford Excursion
 
Join Date: Oct 2010
Location: Pickerington
Posts: 160
EMC V10 X is starting off with a positive reputation.
WOuld it cause an issue if I topped it off (it was a quart low) with Mercon/Dexron III? I have no idea what fluid was in it.
__________________
2001 Ford Excursion 4x4 V-10
Reply With Quote
  #6 (permalink)  
Old 01-20-2011, 07:18 AM
Mark Kovalsky's Avatar
Mark Kovalsky Mark Kovalsky is offline
Post Fiend
Garage is empty, add now
 
Join Date: Aug 1999
Location: SE Florida
Posts: 10,255
Mark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputation
No, that would not cause a problem.
__________________
Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
Reply With Quote
  #7 (permalink)  
Old 01-20-2011, 10:29 AM
MikeMcCasland's Avatar
MikeMcCasland MikeMcCasland is offline
Senior User
Garage is empty, add now
 
Join Date: Apr 2008
Location: Round Rock, TX
Posts: 361
MikeMcCasland is gaining momentum as a positive member of FTE.
Hey Mark,

While we're talking about it, what is your preferred brand of Mercon V in the 4R100? Any real advantages in your opinion of one fluid over the other?

Very Respectfully,
Mike
__________________
Mike - 2004 F-250 V10 CC FX4 SRW
Reply With Quote
  #8 (permalink)  
Old 01-20-2011, 10:33 AM
DavidB DavidB is offline
Elder User
Garage is empty, add now
 
Join Date: Jan 2002
Posts: 561
DavidB is gaining momentum as a positive member of FTE.
Quote:
Ford respec'd MERCON V
Mark,
Do you know if they changed the formula of the fluid when they respec'd it? The reason I ask is that I have some Mercon V that I bought several years ago and I wondered about compatability with the newer Mercon V. Is there a spec number for the old and the new that I could compare for compatability?
Thanks.
Reply With Quote
  #9 (permalink)  
Old 01-20-2011, 10:39 AM
nebo nebo is offline
Posting Guru
Garage is empty, add now
 
Join Date: Oct 2010
Location: Freetown, Indiana
Posts: 1,027
nebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputationnebo has a superb reputation
great post EMC. just went through this myself........and I discovered just what Mark and the others are saying. Thanks much fellas for the help!
__________________
the old firewood/deer hauler
the new firewood/deer hauler
Wag
Reply With Quote
  #10 (permalink)  
Old 01-21-2011, 08:29 AM
Mark Kovalsky's Avatar
Mark Kovalsky Mark Kovalsky is offline
Post Fiend
Garage is empty, add now
 
Join Date: Aug 1999
Location: SE Florida
Posts: 10,255
Mark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputation
Quote:
Originally Posted by MikeMcCasland View Post
Hey Mark,

While we're talking about it, what is your preferred brand of Mercon V in the 4R100? Any real advantages in your opinion of one fluid over the other?

Very Respectfully,
Mike
I like Mobil 1 Synthetic ATF.

Quote:
Originally Posted by DavidB View Post
Mark,
Do you know if they changed the formula of the fluid when they respec'd it? The reason I ask is that I have some Mercon V that I bought several years ago and I wondered about compatability with the newer Mercon V. Is there a spec number for the old and the new that I could compare for compatability?
Thanks.
Yes, the formula was changed. Older MERCON V is different and is not compatible with a 4R100.
__________________
Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
Reply With Quote
  #11 (permalink)  
Old 01-21-2011, 09:44 AM
DavidB DavidB is offline
Elder User
Garage is empty, add now
 
Join Date: Jan 2002
Posts: 561
DavidB is gaining momentum as a positive member of FTE.
That's what I suspected. Thanks for the confirmation.
Reply With Quote
  #12 (permalink)  
Old 01-21-2011, 09:59 AM
Krewat's Avatar
Krewat Krewat is offline
Super Moderator
Garage is empty, add now
 
Join Date: Jul 2002
Location: Long Island USA
Posts: 34,201
Krewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputation
Reps for Mark
__________________
- art k. - Moderator for the Superduty, V10, 6.2L and FE forums
'13 Taurus SHO 3.5L Ecoboost w/Perf Pkg
'01 F250SD SC SB XLT V10 4x4 Volant CAI Hedman headers 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased!
I've been wrong before, I'll be wrong again. Just wait and see. ®
Reply With Quote
Old 01-21-2011, 09:59 AM
Reply

Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Super Duty & Heavy Duty

Tags
dex, dexron, do, duty, fluid, iii, iiimercon, lll, mercon, mercondexron, mix, mixing, super, type, vs

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 12:33 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.5.2 ©2010, Crawlability, Inc.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.



 
vbulletin Admin Backup