Mercon vs. Mercon V
Thread Starter
|
Junior User
Joined: Dec 2006
Posts: 86
Likes: 0
From: Prairie View, Texas
Mercon vs. Mercon V
Have a '99 F250 83,000 miles with the 4r100 tranny and just changed the fluid in the pan (didn't drain the converter) and added Mercon per manual spec. Well just out of curiosity I checked my repair invoice from 40,000 where the dealer flushed the tranny and added Mercon V ! Now I have half Mercon and half Mercon V in my tranny! What should I do ?
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
According to TSB 06-14-4..............
Beginning immediately all automatic transmission / transaxle applications requiring MERCON® can now be serviced using MERCON® V or MERCON® Automatic Transmission Fluid or dual usage fluids labeled MERCON® / MERCON® V. After July 1, 2007, MERCON® Automatic Transmission Fluid will no longer be manufactured, therefore, availability of this fluid will only continue for however long it takes to deplete what remains in inventory.
Beginning immediately all automatic transmission / transaxle applications requiring MERCON® can now be serviced using MERCON® V or MERCON® Automatic Transmission Fluid or dual usage fluids labeled MERCON® / MERCON® V. After July 1, 2007, MERCON® Automatic Transmission Fluid will no longer be manufactured, therefore, availability of this fluid will only continue for however long it takes to deplete what remains in inventory.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
I wouldn't worry about the mix, jutahh1
Mercon V has some anti-chatter additives similar to what goes into limited-slip rear-ends.
I don't think the oil itself is any different in viscosity or anything else.
Dave raises a good point, Ford has phased out Mercon in favor of Mercon V. While this goes directly against the warnings they put in the owner's manual about "Mercon ONLY!", I don't think that warning is telling you to avoid Mercon V.
We've discussed this many many times. We've heard from people using Mercon V for a hundred-thousand miles and no issues.
Mercon V has some anti-chatter additives similar to what goes into limited-slip rear-ends.
I don't think the oil itself is any different in viscosity or anything else.
Dave raises a good point, Ford has phased out Mercon in favor of Mercon V. While this goes directly against the warnings they put in the owner's manual about "Mercon ONLY!", I don't think that warning is telling you to avoid Mercon V.
We've discussed this many many times. We've heard from people using Mercon V for a hundred-thousand miles and no issues.
Thread Starter
|
Junior User
Joined: Dec 2006
Posts: 86
Likes: 0
From: Prairie View, Texas
Thanks 4 the reassurance krewat, I was getting a little worried there 4 a minute.
jutahh1
ps I also noticed that the dealer didn't change the tranny filter @ 40,000....should I go ahead and change it now @ 83,000 ?
jutahh1
ps I also noticed that the dealer didn't change the tranny filter @ 40,000....should I go ahead and change it now @ 83,000 ?
Last edited by jutahh1; Jan 30, 2007 at 12:57 PM.
Senior User
Joined: Feb 2006
Posts: 221
Likes: 0
My wife's cousin is the service manager for a Lincoln dealer...he told me awhile ago that Mercon V was developed as a semi-synthetic ATF with additives to eliminate transmision shudder in the newer automatic trannys. He also said that the Mercon V can be used anywhere Mercon is originally recommended by the factory...they can be mixed without worry, unless the tranny starts to shudder.
I have topped off a transmission with Mercon V many times (it is all I ever buy), not knowing what was in the tranny to begin with...never had an issue.
Bottom line, you should be fine, but next time I would personally opt to use the Mercon V....
I have topped off a transmission with Mercon V many times (it is all I ever buy), not knowing what was in the tranny to begin with...never had an issue.
Bottom line, you should be fine, but next time I would personally opt to use the Mercon V....
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Originally Posted by davzog
My wife's cousin is the service manager for a Lincoln dealer...he told me awhile ago that Mercon V was developed as a semi-synthetic ATF with additives to eliminate transmision shudder in the newer automatic trannys.
The problem is, the 4R100 never HAD any shudder... so it never needed Mercon V.
Which is where the debate comes from. The 4R100 never needed Mercon V to eliminate TC lockup shudder.
But, it is spec'd to replace Mercon, so ...
Trending Topics
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 6
From: Albuquerque
Originally Posted by jutahh1
ps I also noticed that the dealer didn't change the tranny filter @ 40,000....should I go ahead and change it now @ 83,000 ?
--> Change automatic transmission/transaxle fluid and filter @ 150,000miles
biz
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Originally Posted by Antelope V-10
Just a question, since MerconV has an anti shudder in it, would it be like putting too much friction modifier in the LS? IE the converter would slip on lock up and the clutch pack in the tranny slip?
The Mercon V I put in my '96 t-bird 4.6L and the '97 Cougar 4.6L definitely made it shift better. Less "grabby" in slipping, but the clutches still 100% grabbed at the same time - it seemed.
BTW, BOTH at exactly 4 years to the MONTH since build-date, one had 50K miles, the other only 12K, had torque converter shudder. Funny how two vehicles with two totally different driving styles both did the TC shudder when they clicked over 4 years old. Some additive in regular Mercon go south after 4 years?
Anyway, having smelled Mercon and Mercon V, I can say that there is a hint of friction-modifier in it.
I didn't want this to turn into a Mercon vs. Mercon V thread again...
However, there is a marked difference in clutch "grabbiness"
Fleet Mechanic
Joined: Nov 2004
Posts: 1,427
Likes: 10
From: Templeton, Massachussetts
Originally Posted by jutahh1
Have a '99 F250 83,000 miles with the 4r100 tranny and just changed the fluid in the pan (didn't drain the converter) and added Mercon per manual spec. Well just out of curiosity I checked my repair invoice from 40,000 where the dealer flushed the tranny and added Mercon V ! Now I have half Mercon and half Mercon V in my tranny! What should I do ?
Thread
Thread Starter
Forum
Replies
Last Post
