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Old 01-20-2010, 01:48 AM
Richards73 Richards73 is offline
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c6 transmission fluid

My haynes repair manual told me to use dexron 3 and mercon automatic fluid but other people tell me type f
does anyone know which one is better use
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Old 01-20-2010, 01:57 AM
brownfoot brownfoot is offline
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read your dipstick, it should say "Type F"
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Old 01-20-2010, 02:07 AM
Richards73 Richards73 is offline
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it says type f i didnt no if it was changed tho because ive herd to use the other and have been having problems with the transmission
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Old 01-20-2010, 05:54 AM
brownfoot brownfoot is offline
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drop the pan, change the filter, and fill with type F
what problems are you having? does it not want to go when you first start and it is cold?
but once it warms-up it acts ok?
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Old 01-20-2010, 07:30 PM
Richards73 Richards73 is offline
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already serviced it
shifts hard and wants to stick in first gear when u first start driving
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Old 01-20-2010, 08:28 PM
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Danny Stroup Danny Stroup is offline
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From my online Chilton's manual:
Fluid Recommendations
  • C4 - Type F
  • C5 - Type H
  • C6 - 1976 Type F; 1977-86 DexronŽII
  • AOD - DexronŽII ATF
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Old 01-20-2010, 09:10 PM
brownfoot brownfoot is offline
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sounds like the valve body is dirty, or can be a symptom of DexronII fluid
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Old 01-20-2010, 10:06 PM
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@PoisonOilRacing
Trans Fluid TSB

here is some info for you:

Ford Trans Fluid TSB
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1976 F-100. 289, AOD
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Old 01-20-2010, 10:50 PM
Richards73 Richards73 is offline
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i have type f fluid in there right now
thanks for the help it sounds like i shoukd stick with the type f fluid
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Old 01-20-2010, 10:56 PM
Richards73 Richards73 is offline
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sometimes it doesnt like to go untill its warmed up is that normal
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Old 01-21-2010, 01:27 AM
brownfoot brownfoot is offline
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for an old transmission with a dirty valve body, yes
what did the pan look like when it was serviced, fluid clean and red or brownish with a lot of black sludge in the bottom?
a valve body rebuild kit/shift kit is about $30 and comes with detailed instructions
clean it in mineral spirits and re-assemble
what is the mileage?
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Old 01-21-2010, 01:51 AM
Richards73 Richards73 is offline
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the fluid looked good when i changed it
the bottom of the pan had some but not much dirt on the bottom
the filter was really dirty tho
were do u get the rebuit/shift kit
thanks
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Old 01-21-2010, 01:52 AM
Richards73 Richards73 is offline
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not really sure the milage 250,000?
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Old 01-21-2010, 05:25 AM
brownfoot brownfoot is offline
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I have used these before for AOD and had goo results, they were recommended by the losal transmission shop
btw, they have VERY detailed instructions along with comments, enjoyed the sometimes scarastic answers/statements
Rebuilt Transmissions Transmission Parts (transgo is company name)
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Old 01-21-2010, 11:17 AM
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Quote:
Originally Posted by Richards73 View Post
sometimes it doesnt like to go untill its warmed up is that normal
Yes it is normal when the seals are dried out. The old tranny guys call it "morning sickness". I have an 86 F250 4x4 C-6 that has been like that for over two years now. Although it shifts good & there is no other problems. What I did that helped get it through the last two years was add a can of TransX. That helps the seals. But this is not a cure. I'm rebuilding mine this spring.
As for fluild as stated above DEXRON II now DEXRON III is what is called for. But if you were not having issues before changing the fluild & you installed Type F hard shifting is normal because of the friction modifiers in Type F. As a rule if I remember correctly if you added Dexron to a type F trans it would be mushy shifting.
I would go to Walmart & buy a can of TransX like $5.79 were the parts houses want $9. See what happens. TransX will not hurt anything. It has been around since I was a teenager in the early 60s. We used it then.
The other option if you have the wrong fluid is to add a can of LubeGard it is a friction modifier.
Hope is helps.

Craig
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Old 01-21-2010, 11:17 AM
 
 
 
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