New transmission, What Fluid to use?

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ShortBed

Senior Member
Joined
Jun 27, 2013
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Location
Howell NJ
Ram Year
2011
Engine
5.7 with Magnuson Supercharger 6lbs of boost
Just sent my trans out for rebuild and just wondering what trans fluid is good to put in it. I just read that Royal Purple isn't what it used to be, so what is the next best thing? Also with our transmissions should I look for a fluid that has the +4? From what I was told our transmission fluid needs to have a fluid with the +4, whatever additive that is. Let me know what you think. Thanks.
 

charonblk07

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Mar 14, 2013
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Location
Calgary, Ab
Ram Year
2009
Engine
F1-A forged 349ci
The RP is still doing just fine in the trans department, it's still a ATF +4 rating. If you're looking for something different then the Amsoil ATF is great and you also can't go wrong with the Mopar ATF.
 
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