III or V; the Mercon debate

depends what you want the "shift-kit" (brand name like Hoover or Kleenex) to do. Some kits out there are bad or options in them are not needed, others try to give the trans a longer life some are tuned just for harder shifting. Theres a lot of talk about certain kits wearing the overdrive band on wide open throttle (W.O.T) shifts, I have one of these kits in my other car and it might be coincidence but the OD band was fried to rivets within 5000miles, while on the other vehicle it was still ok. You can adjust most things with a tuner (pressures, firmness etc), so might go that way... no tools needed

Main purpose for most is to eliminate slipping which causes heat which causes your trans to burn up sooner, down side is the less slipping hits harder on the driveline, internal trans parts and wears those down quicker.

Only reason Im using one is if you produce more power theres a chance of slippage and increasing pressure will reduce the chance of that. I have to have harder shifts due to some internal friction materials I am using will not last long with excessive slippage.

back up a little bit.. Ford says not to mix mercon and mercon V (full synthetic atf) while some are saying its ok to mix it? reason im dropping the pan to begin with is a light shudder in high gears, low speeds. fluid is still faintly pink, not running hot.. just want to put in whats recommended but im getting confused. lol

Use the Mercon V, and drain the torque converter of those four quarts also. That takes just a few minutes, turning the engine to find the drain plug etc. If you had some other bad fluid in it, you would want to drain it all, but for the normal case, do what is no trouble. Do the filter and TC(torque converter), that gets most of the fluid out. If you have an AWD then do the TC also with Mercon V. Regards,

The 4R70W Transmissions should use Mercon V. I am at 160,000 miles and have used Castrol Mercon V (A semi-synthetic) since I purchased the truck at 100,000.

There was a company selling an additive to "boost" Mercon to Mercon V specs a while back. Galcier991 talked about it.

The additive is made by Lubegard.

does that crap work, trans shop said yes, but I didnt chance it and bought actual Mercon V. Is Mercon V actual synthetic which makes it slippier and that additive is basically friction modifier like what you add in the diff to stop chatter etc? Meaning the Mercon V is a superior oil? beats me, it sure costs a lot more. maybe i should read teh bottle

reserved50 said:

does that crap work, trans shop said yes, but I didnt chance it and bought actual Mercon V. Is Mercon V actual synthetic which makes it slippier and that additive is basically friction modifier like what you add in the diff to stop chatter etc? Meaning the Mercon V is a superior oil? beats me, it sure costs a lot more. maybe i should read teh bottle

Click to expand...

Mercon V is a semi-synthetic. It has additional additives.

Bottom line is that it is CALLED FOR by most modern Ford Electronically Controlled Transmissions, such as the 4R70W.

I have Mercon and that Lubegard additive in my 99 5R55E now. I decided to do that and change fluid in a short time later. I'm at 15k now and about to change to Amsoil ATF soon. Use the best fluid that you can, the mileage may be worth it, mpg and lifespan. Regards,

I'll see how long the fluid lasts compared to the Mercon V Ford stuff, if its starting to burn I'll switch to a racing oil (better quality). It should be back on the road today if Im not lazy.



heres an old video

I like the painted grille and rear bumper, the sounds aren't bad either. Open the door.

no, most of my creative thinking is done with CO2

According to this article, Ford is phasing out Mercon. They will no longer issue any new Mercon licenses, and according to this article, all licenses were to expire June 30th of 2007.
http://www.imakenews.com/lng/e_article000564317.cfm?x=b11,0,w

When I took my truck in for a transmission service about a month or two ago, the receipt said 6 quarts of Mercon V were used. That was maybe 4,000 miles ago and the transmission doesn't shift any differently.

And here is a TSB saying that V is a suitable replacement in any application calling for plain Mercon...
http://www.ford-trucks.com/tsb/fulltext/show_article.php?tsb=06-14-4

TSB 06-14-4 MERCON ATF IS BEING REPLACED BY MERCON V ATF AS A SERVICE FLUID.

Publication Date: June 29, 2006

FORD: 1980-1997 Crown Victoria
1981-1997 Mustang, Thunderbird
1981-2003 Escort
1986-1993 Festiva
1986-1997 Taurus
1989-1997 Probe
1994-1997 Aspire
1995-2000 Contour
1980-1996 Bronco
1981-2003 F-150
1981-2004 E-Series, F-Super Duty
1983-1996 Ranger
1986-1996 Aerostar
1991-1997 Explorer
1993-2004 F-53 Motorhome Chassis
1995-1998 Windstar
1997-2004 Expedition
2000-2005 Excursion
2001-2007 Escape
1987-2000 F- & B-Series
2000-2007 F-650, F-750
LINCOLN: 1980-1997 Town Car
1981-1997 Continental
1993-1997 Mark VIII
1998-2004 Navigator
2002-2003 Blackwood
MERCURY: 1980-1997 Grand Marquis
1981-1997 Cougar
1986-1997 Sable
1987-1999 Tracer
1995-2000 Mystique
1999-2002 Cougar
1993-2002 Villager
1997 Mountaineer
2005-2007 Mariner
MERKUR: 1985-1989 XR4TI

This article supersedes TSB 01-15-7 to update the vehicle application chart.

ISSUE:
MERCON® Automatic Transmission Fluid is being replaced by MERCON® V as a service fluid.

ACTION:
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.

SERVICE PROCEDURE.

Service automatic transmissions requiring MERCON® with MERCON® V or MERCON® Automatic Transmission Fluid or dual usage fluids labeled MERCON® / MERCON® V.

For proper fluid application on current and past model vehicles equipped with automatic transmissions / transaxles refer to the fluid usage chart. (Figure 1).

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