I was going to change fluid in my 2001 F-350 with 175000 miles on it. Any opinions on brand of synthetic ATF to use.

 

I use Amsoil ATF in mine, and have had no problems. I've also read that Mobil 1, Red Line, Royal Purple etc., all seem to do ok.

 

im runnin amsoil, and am really happy with it

 

I run Redline D4 synthetic ATF in mine. I'm thinking about changing that out with Redline MTL next time, but need to research that one.

 

Yeah I heard the redline MTL is the way to go. I will be changing mine to that this weekend. I just changed my tranny fluid 3,000 miles ago with Mobil 1 ATF synthetic. I think it is too slippery. My 2nd and 3rd gears grind when shifting at high Rpm's quickly. I also have 170,000 miles on my truck so my synchronizers are a little worn.

 

I was just reading sum info on redline D4 and MTL and it seem's like D4 is the one they recommend for dexron mercon requirements. MTL must be a little thicker but still meets the ATF specs. Maybe alright for my higher mileage tranny. I get some gear grind between 2nd and 3rd also. Anybody have MTL in there truck.