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Transmission Fluid

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Old Mar 12, 2007 | 10:29 AM
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Transmission Fluid

I've got an '02 X 7.3 PSD with the 4R100 tranny. It still has the stock fluid in it and I'm not ready to do a full flush yet. If I do a little towing (4-5 trips with a 6000 pound camper) per year, what fluid type / brand should I be adding that will give good performance and still blend well with the existing transmission fluid that came with the truck from Ford?
 
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Old Mar 13, 2007 | 07:32 AM
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Any fluid that has a MERCON rating will work fine.
 
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Old Mar 13, 2007 | 10:35 AM
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You are already there when you change fluid so why not drain the TC? If you don't want to, you don't have to unhook the cooler lines and blow them out. I'd use Amsoil. Also look into getting a 6.0L Cooler for the trans.
 
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