Downwards666 Posted April 17, 2023 Share Posted April 17, 2023 (edited) Hello all. I have a 2012 Fusion SEL AWD, 3.0L V6, 6F35 Transmission. Bought is a little over a year ago, with 86K miles on it. Well, the PTU went, so I replaced it with a new OEM from the stealership, got it all back together, everything torqued to spec, and now it's leaking ATF where the PTU mates up to the transmission. Mating surfaces were clean. There is no gasket that goes between the Trans and PTU. Looked at the service manual, and it just says to tighten the 5 mounting bolts to spec. So I'm not sure what I should do to stop this ATF leak. Should I pull it back apart, and use RTV on the mating surfaces? try to torque the mounting bolts down a little more? If anyone has replaced their PTU and had an ATF leak between the Trans and PTU, any help would be appreciated. Thanx. Edited April 17, 2023 by Downwards666 0 Quote Link to comment Share on other sites More sharing options...
dcell Posted April 17, 2023 Share Posted April 17, 2023 Yeah, If I were you i'd purchase "Genuine Ford Fluid TA-31 RTV Silicone Sealant" and really clean those mating surfaces good with microfiber cloth and acetone. Any gunk or stubborn material I would use a brass wire wheel and apply light pressure to remove. That sealant from ford is really good stuff just keep in mind you may need a caulking gun depending on the tube you buy. Try not to apply too much sealant while also trying not to apply too little. Keep in mind the sealant will compress and buldge outwards when tightening the mating surfaces together. I'm thinking you may have a leak due to uneven mating surface or possibly you're torque wrench is inaccurate and the bolt's aren't tight enough. Don't be afraid of hand tightening them further once you hear the click. As long as you have them nice and tight before they start stripping you'll be fine. 0 Quote Link to comment Share on other sites More sharing options...
Downwards666 Posted May 1, 2023 Author Share Posted May 1, 2023 Hey, thanx for the reply. There doesn’t seem to be a lot of people familiar with this setup, so I’m glad there was someone who is. I ended up pulling it all back apart, replacing the output shaft seal on the transmission(like I should’ve in the 1st place). I did clean the mating surfaces of the trans with a brass wire wheel to try to get the surface smooth), and did use some RTV between the mating surface of the trans and PTU. Good news, it’s all back together and not leaking! So again, thank you for your reply/info. I appreciate it! 0 Quote Link to comment Share on other sites More sharing options...
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