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4r70w fluid type????

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Old Feb 2, 2008 | 01:12 PM
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4r70w fluid type????

I have type "U" trans code with 14 bolt trans pan cover, dipstick says mercron, I have read in other places that folks say use mercron 5.
just left autozone for the fluid and on the computer it said "do not mix mercron with mercron 5 or damage will result"

Can someone clear it up...i bought mercron, but am scared to put it in til i know for sure...

oh yeah, truck is 1994 5.0 with 3.55 gears

thx
 
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Old Feb 2, 2008 | 03:36 PM
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From: Easton,Ks
If you are adding I would put Mercon 3 in it. Just playing the odds here as it more than likely had 3 in it.
If you are changing it and flushing the system and TQ then put Mercon 5 in it.
 
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Old Feb 3, 2008 | 01:52 PM
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From: Chestermere,Alberta
Autozone are idiots. Ford has put out a bullitin to all Ford dealers. Merc 5 does and will work in a trans that used to run mercon/dex 3. It will not hurt the trans or it's components.
 
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Old Feb 3, 2008 | 09:24 PM
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Is 5 better than 3? If so whats better about it?
 
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Old Feb 3, 2008 | 09:33 PM
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From: Chestermere,Alberta
It is a synthetic fluid.
 
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Old Feb 3, 2008 | 09:45 PM
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From: Easton,Ks
Originally Posted by TexasGuy001
Is 5 better than 3? If so whats better about it?
It is a new reformulated to cover most automatic transmission and will stop the shudder sometimes if you have transmission clutch shudder.

Here is a chart.




/
 
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