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Will Ford ATF hurt GM trans??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by creampuff90k5, Feb 19, 2003.

  1. creampuff90k5

    creampuff90k5 1/2 ton status

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    The other day when changing the fluid and filter on my 700R4, I accidently added a quart of Ford ATF along with the other four quarts of Dexron III/Mercon. The ford stuff was on the same garage shelf - left over from an old mustang project. Anyway, is this going to hurt anything? The truck seems to drive fine, but as much as I don't want to take the pan down again, this mistake is kinda bugging me... Am I just paranoid?
     
  2. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    You will be fine as long as it was ATF and not somethin else /forums/images/graemlins/thumb.gif
     
  3. 90K5

    90K5 1/2 ton status

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    I think the ATF+3 for chryslers is what you need to worry about, dont fords use dexron also?
     
  4. the professor

    the professor 1/2 ton status

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    Dextron III...
    7.5wt..Loaded with friction modifiers for a smooth shift, and to reduce lock-up shudder

    Ford Type FA
    10wt...Not as many friction modifiers, but has some for lock-up converters to prevent shudder--Most European cars now.
    .
    Ford Type F
    10wt...NOt as many friction modifiers, NO addatives for the converter..not used in anything OEM
    --
    1qt out of 10 to 12 will make absoultely NO difference...all the additives you will ever need are in the other 9-11qts
    --
    Ford Type F is recommended by B&M, if you don't want to spend $7.00 a qt for their fluid..It shifts better..fewer adatives to make it slip...

    I use it in my TH400 (no lock-up)

    You can use Type FA with a lock-up

    All Fords, after about 1985, and ANY that have been rebuilt are recommended with Dextron...It is to make them shift smoother...The C5, with a lock-up uses FA or Dextron III

    I am factory certified in these transmissions
    PowerGlide/TurboGlide/Th350-350c-375/Th400-475/Th200-200r4/Th700r4...Ford C3/C4/C6/AOD/A4LD/(fwd)AXOD/ATX and some others

    I haven't done transmissins regularly since about 1986, but I am still current

    /forums/images/graemlins/cool.gif /forums/images/graemlins/truck.gif
     
  5. Lonnie

    Lonnie 1/2 ton status

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    Type "F" Ford fluid improves clutch holding power & shift firmness. I routinely use type "F" fluid in my performance builds on GM transmissions. I do not really recommended to mix the 2, but there should be no adverse reaction from adding 1 quart to your trans.
     
  6. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    [ QUOTE ]
    I am factory certified

    [/ QUOTE ]

    Did you used to be a Ford tech?

    I was a Ford auto trans tech for 8 years.I was certified in alot of different areas but ATs were my specialty.I was goin for Master Tech so I could get that cool little statue /forums/images/graemlins/grin.gif
     
  7. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> Shouldn't be a problem, adding a quart to a GM tranny tends to have about the same effect as the B&amp;M Trick Shift stuff, but for alot less money. /forums/images/graemlins/thumb.gif</font>
     
  8. creampuff90k5

    creampuff90k5 1/2 ton status

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    Thanks for your help everyone. Based on the advice, I have decided to just leave it alone. By the way, the odd quart of fluid was Ford Type F... got lucky I guess!
     
  9. the professor

    the professor 1/2 ton status

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    To frizzlefry:

    mostly Lincoln/Mercury in my last 6 years...although I did work at Ford prior to that

    We rarely did trucks, except for the occasional light p'up or recall on a commercial van or p'up
    --
    I got away from AT's, in about 1986, because I hate to work on FWD..went to EEC specialist..I still did transmissions occasionaly when the trans guy got sick or overloaded...(under much protest)
    --
    To bad Ford stopped the Ford Dinners, got to know techs from all over..
    Might even have seen you at school, if you were closer, but I went out on med dissablilty in 1996, so maby not
    .. /forums/images/graemlins/cool.gif /forums/images/graemlins/truck.gif
     
  10. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    I loved AXOD/Es,I made ALOT of $$ off of those

    I could have one out of the car and apart on the bench in about 50 minutes /forums/images/graemlins/grin.gif Those were easy 13-17 hour warranty paying tickets.

    Now 6 cyl Contours and Mystiques,I was lucky to get out in 2-3 hours and they didnt pay $hit /forums/images/graemlins/grin.gif
     
  11. BanksBurban

    BanksBurban Registered Member

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    I'm having the 400 in my Burb rebuilt. Should I tell him to fill it with Type F? Will it reduce wear on the clutches and make the trans last longer?
     

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