Is dex/merc compatible with atf +4?
Jun 11, 2019 at 8:16 AM
Transmission fluid compatibility
2009 RAM 2500
JESSIE WORTHINGTON
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Hi Jessie,
The oil manufacturer says they are compatible but Chrysler says nothing but ATF +4. I have found that when you mix them or replace with dex/merc it shifts firmer. I don't really like that so I would stick with what the OEM recommends. I understand it is a little more expensive but they designed it to use that fluid not any other.
If it were me, I would stick with what they recommend.
Let me know if you have any other questions. Thanks
The oil manufacturer says they are compatible but Chrysler says nothing but ATF +4. I have found that when you mix them or replace with dex/merc it shifts firmer. I don't really like that so I would stick with what the OEM recommends. I understand it is a little more expensive but they designed it to use that fluid not any other.
If it were me, I would stick with what they recommend.
Let me know if you have any other questions. Thanks
Apr 21, 2021 at 3:31 PM
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