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I found this info on ATF about Dex Merc Type F Type A. Thought Id share.

Discussion in 'The Hokey Ass Message Board' started by garagedoreen, Feb 25, 2010.

  1. garagedoreen
    Joined: Dec 12, 2006
    Posts: 168

    from LA,CA

    I found this article about ATFs. I thought Id share with all of you if your interested. I copied and paste it here. Hope this helps somebody.

    - Steven

    Auto Tech: Know which automatic transmission oil to use

    by Jim Kerr
    It used to be so simple. There was Type A or Type F. If your automatic transmission needed oil, you only had two to choose from. Many Fords used Type F transmission oil while Type A was used in everything else. Today, there are several types of oil specified for automatic transmissions. Using the wrong one can cause shifting problems or even damage your transmission. Here are the more common automotive transmission oils used today.
    Dexron Automatic Transmission Fluid (ATF) is probably the most common oil found on the parts shelves today. It used to be called Type A transmission oil but as improvements were made to the oil, the name was changed to Dexron. Many types of Dexron oil have been used over the years. The original Dexron oil became Dexron II, which developed into Dexron IIE in the early 1990’s. Dexron IIE used extra additives that helped clean computer-controlled shift solenoids and pressure control solenoids inside the transmission. After only a short time, Dexron IIE became Dexron III, which is still the current Dexron designation.
    So which one should you use? The answer is easy. Dexron III is the only Dexron oil available and it can be used wherever Dexron oils were specified. Most General Motors vehicles, many foreign manufacturers, Chrysler vehicles (up until about 1997} and even Fords from the 1950’s listed Dexron oil as suitable for their automatic transmissions. Dexron has even been specified in some industrial hydraulic systems and power steering systems, although most automobiles use special power steering fluid for their power steering.
    Type F oil has traditionally been associated with Ford vehicles prior to 1977, but is was also used in some other makes between 1977 and 1981. Type F oil has different additives in it that match the friction characteristics of the clutch plates used in their automatic transmissions. The additive package in Type F oil is very strong, so one litre of Type F oil added to several litres of Dexron oil will essentially change all the oil to have Type F characteristics. For example, if Type F oil was added to a GM vehicle, the shifts would feel more aggressive. Type F oil is not interchangeable with MERCON ATF.
    MERCON ATF is used in most late model Fords up until 1997, when MERCON V ATF came into use. MERCON ATF is much like Dexron and many ATF labels will list the oil as suitable for both Dexron and MERCON applications. MERCON V is different. Beginning in 1997, Ford began building transmissions for some of their large cars, trucks and vans that require a MERCON V ATF. Generally, MERCON V and MERCON oils are not interchangeable although there are some ATF brands on the market that meet the specifications for both. Check the label on the ATF container carefully!
    Although Chrysler has always had their own ATF specifications, they also listed Dexron as an acceptable replacement. That changed in 1997 with the introduction of their ATF+3 fluid. ATF+3 is suitable in any vehicle calling for ATF PLUS, ATF+2 or a Type 7176 ATF. Some Mitsubishi and Hyundai transmissions also use this oil.
    Some vehicles have very specific oils for their automatic transmissions. Honda for example, uses engine oil for automatic transmissions in some models. ZF automatic transmissions found in many European and some Asian vehicles often specify ESSO LT 71141 or T-IV ATF only! There are also synthetic transmission fluids available on the market, but before using one, make sure it meets the specifications for your transmission. One-way roller and sprag clutches used in many automatic transmissions require some friction to work, so the wrong oil can reduce their
    efficiency and cause them to slip.
    The owner’s manual will list the proper type of fluid for your vehicle’s transmission, or if you can’t find it, check at your local dealership for their recommendations. While most quick lube places have listings for most vehicles, they may not be familiar with your particular vehicle and could add the incorrect oil. Know the type of oil your transmission needs and be sure to ask what they are adding before they put any in.
    The automatic transmission has come a long way from a novelty introduced in 1940 by Oldsmobile to the highly sophisticated computer-controlled gearbox of today. So have the oils. Use the correct oil for your transmission to prevent damage to this essential part of your vehicle’s

    Jim Kerr is a master automotive mechanic and teaches automotive technology. He has been writing automotive articles for fifteen years for newspapers and magazines in Canada and the United States, and is a member of the Automobile Journalists Association of Canada (AJAC).
  2. RodStRace
    Joined: Dec 7, 2007
    Posts: 2,354


  3. Very interesting read.
  4. And, of course many of the newer manual transmissions use ATF instead of gear oil.

  5. Hackerbilt
    Joined: Aug 13, 2001
    Posts: 6,245


    We used to run type F in our Chevy T350's and 400's...really firmed up the shift.
    Was as good as the old "B&M Trickshift" fluid but at least 1/2 the cost at the time!
  6. Man, is that ever the truth! Hate that it is hard to find now.
  7. Spity
    Joined: Dec 20, 2008
    Posts: 438


    I think almost all of us are guilty of this :rolleyes:.
  8. Fenders
    Joined: Sep 8, 2007
    Posts: 3,922


    Must be an old article - my 2006 GMC pickup wants Dexron VI.

    Just reading it makes me wanna use a 1939 Ford transmission in my next build!
  9. slik
    Joined: Jan 11, 2008
    Posts: 183


    perfect timing on this post. i was just getting ready to put fluids in my old caddy, and it asked for type A. of course the local stores did not know what type A was...
  10. Fenders
    Joined: Sep 8, 2007
    Posts: 3,922


    Interesting article but contradictory and pretty useless, except for this sentence:
    "The owner’s manual will list the proper type of fluid for your vehicle’s transmission, or if you can’t find it, check at your local dealership for their recommendations."
  11. flypa38
    Joined: May 3, 2005
    Posts: 530


    So what SHOULD I run in a mid 50's Jetaway/Stratoflight GM Hydromatic? The dealerships and parts stores don' t even know who made a Star Chief and usually never heard of it! The owners manual has a futuristic (for the time) space age brand name for the suggested transmission fluid. So which modern ATF is best to keep my old '56 healthy and shifting properly now and for the long haul?
  12. mike hohnstein
    Joined: Dec 4, 2011
    Posts: 262

    mike hohnstein
    from wisconsin

    We build many vintage transmissions, and other than the brass clutch Phords where Type F is required, Dextron is the answer. Hell, I run that stuff in my Allisons, not to worry.
  13. fordcragar
    Joined: Dec 28, 2005
    Posts: 3,180

    from Yakima WA.

    Interesting article. This last weekend my daughter was looking for a quart of Type F and couldn't find it at the local parts store.
  14. Da Tinman
    Joined: Dec 29, 2005
    Posts: 4,226

    Da Tinman

    B&M trickshift IS type F.
  15. Hackerbilt
    Joined: Aug 13, 2001
    Posts: 6,245


    Could be!
    I have no idea...but wasn't it a different color?
  16. yetiskustoms
    Joined: May 22, 2009
    Posts: 1,932


    i use type f in my chevys for years. shift kit in a bottle.never had issues. an old timer told me to do it.
  17. Black_Sheep
    Joined: May 22, 2010
    Posts: 1,222


    Yep, with blue dye...
  18. Da Tinman
    Joined: Dec 29, 2005
    Posts: 4,226

    Da Tinman

    Yeah made by sweatshop Smurfs.........

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