Trans. Fluid Change
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New User
Joined: Aug 2006
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Trans. Fluid Change
About to do a full trans fluid change on my 2000 Mountaineer 5.0 AWD (4R70W). I'm going to use Motorcraft Mercon V. I have seen reference on this forum about an additive that needs to be added to prevent solenoid seal swelling. What is this additive? Do I need it for sure? How much to add? Where can I get it? Anybody got a Ford P/N for it? TIA
Senior User
Joined: Aug 2007
Posts: 129
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Your owners manual or dipstick should have the fluid for your trans listed. Mercon V is a synthetic fluid. There are additives for dextrin III from Lubegard and Smartblend to make it compatible for Mercon V applications. But I have never herd of a additive to prevent swelling
