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tranny fluid - Ford-O-Matic

Posted By f-fun2 14 Years Ago
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f-fun2
Posted 14 Years Ago
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Hey guys, getting ready to change filter and tranny fluid for the first time in my 57 pickup since I bought it. It is a Ford-O-Matic trans. What fluid should I be using for this transmission? Is regular Type F OK? Thanks. 
crenwelge
Posted 14 Years Ago
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Type F was especially made for that vintage of Fordo.

Kenneth

Fredricksburg, Texas
oldcarmark
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Actually Dexron 3 is the replacement for Type  "A".There are several topics on this if you do a search in the little box at top right of home page.

http://forums.y-blocksforever.com/Uploads/Images/a82cee8f-be33-4d66-b65d-fcd8.jpg  http://forums.y-blocksforever.com/uploads/images/339ed844-0bc3-4c73-8368-5dd3.jpg
paul2748
Posted 14 Years Ago
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oldcarmark is correct. Type F came later (C-4 & C-6???) . Original is Type A, hard to find if it's even out there. I am using Type F in my Fordo and everything seems ok though.

54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

oldcarmark
Posted 14 Years Ago
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Hi Paul.I am using type  "F" also.After I drained  and refilled assuming "F" was the replacement  for "A" .Marvh actually posted the correct info if you go to a search for "transmission fluid".Type F will work fine but Dexron 3 will give smoother shift.

http://forums.y-blocksforever.com/Uploads/Images/a82cee8f-be33-4d66-b65d-fcd8.jpg  http://forums.y-blocksforever.com/uploads/images/339ed844-0bc3-4c73-8368-5dd3.jpg
f-fun2
Posted 14 Years Ago
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Sounds like both will work, but a smoother shift would be nice so I may go with the Dexron. Thanks everyone.
oldcarmark
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Just be sure to drain ALL the existing fluid.There are 2 plugs on the convertor.Undo one and then turn convertor 180 and do the second one.Let it sit as long as possible(overnite+) to drain as much fluid as possible.

http://forums.y-blocksforever.com/Uploads/Images/a82cee8f-be33-4d66-b65d-fcd8.jpg  http://forums.y-blocksforever.com/uploads/images/339ed844-0bc3-4c73-8368-5dd3.jpg
marvh
Posted 14 Years Ago
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The older Fordomatics, (pre 1958) called for Type A automatic transmission fluid. (There is also an aluminum case Fordomatic 2spd that came out in 1959. I don't remember what trans fluid was recommended) Type A has been replaced by several different Dexrons and what is now Dexron III.

Type F fluid came out for use in the new cruise-o-matic transmissions in about 1958. Type F was also used in the FMX and most pre '77 Ford transmissions and in some other Ford transmissions til 1981.
Most oil manufactures list pre 77 Ford's to use Type F as they seem to believe there are no Fords still running that are older than 1958.

Type F has a higher viscosity than Dexron III and a higher heat tolerance. Dexron has more lubricity than Type F which makes a softer shift compared to the Type F which is more firm or harsh.

The key thing is;  use what you transmission rebuilder advises as he may has installed the newer bands and clutches that use a material that requires a Dexron III fluid. Also he is the guy who has to provide warranty.

Do not use the newer fluids such as Mercon V which has a very different formula used for the lock up converters.

There is newer Type FA on the market which is supposed to be a replacement for Type F and superior to the original Type F. I am not up to speed on it.

here is some interesting reading on the Type f vs Type A and Dexron fluids

http://www.pennzoil.ca/documents/Automatic%20Transmission%20Fluid.pdf
http://www.hwpetro.com/_fileCabinet/TexacoData/Hav-ATF-F.pdf
http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_ATF_Type_F.aspx
http://www.redlineoil.com/product.aspx?pid=52&pcid=9
http://ezinearticles.com/?Use-the-Correct-Type-of-Transmission-Fluid-to-Prevent-Mechanical-Problems&id=4847509

marv

crenwelge
Posted 14 Years Ago
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Type A is still available, but I can't say I recommend it for anything other than a jalopy that leaks a lot. I sell this stuff for $1.99 a quart retail.



http://www.warrenunilube.com/transfluids.html





You can't expect much for that price.

Kenneth

Fredricksburg, Texas
HT32BSX115
Posted 14 Years Ago
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The key thing is; use what you transmission rebuilder advises as he may has installed the newer bands and clutches that use a material that requires a Dexron III fluid. Also he is the guy who has to provide warranty.






Howdy,





I asked the guy that rebuilt my custom E4OD recently and he told me that if your Ford-o-matic has "brass" clutches, you MUST use "F"



If it has more modern clutch material, you should use Dexron/Mercon.



He also said If you use Dexron/mercon in a trans with brass clutches, you will have problems.





Cheers,





Rick






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1955 F-600/272/E4OD// Disclaimer: No animals were injured while test driving my F-600 except the ones I ran over intentionally!

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