Trans fluid opinions?

[OregonStroker]

I need to do a trans service on my pickup and am wondering what fluid is best. I am looking to do a synthetic. Any opinions would be appreciated.

[Hank]

Not sure you will find any better than this. PM me for help.

AMSOIL - Synthetic Universal Automatic Transmission Fluid (ATF)

[NCHornet]

I have gone the synthetic route and I saw no improvement or lower temp as they claim, so my advice is don't waste your money and stick with DINO fluids. I also know Hank above and if he says Amsoil is good than I have no reason to doubt him, not trying to take a sale from Hankdaddy!!!
Just remember that only Mercon/Dexron III fluid is approved for the 4r100, no Mercon V!!!


NCH

[OregonStroker]

Thanks hornet and hank. I'm just gona have jiffy do a merc/dex three 100 percent fluid swap for 99,99 can't beat it. Thanks guys.

[dmc919]

you can use mercon V in a 4r100

Ford TSB advising of Fluid usage change

[Tony V]

Last time I asked ford what to put in my trans they said mecron v........

[2000_f350]

Originally Posted by dmc919

you can use mercon V in a 4r100

Ford TSB advising of Fluid usage change

You can if you like. I went to the shop saturday and had mine flushed. They asked what kind of fluid I had and I told them dex III. They showed me one that was out of a truck because of dexV. They told me NO dexV. They have a 01 f350 service truck with 475k on the stock engine and trans. Never done anything other than change the fluids on time and a glow plug relay. I figure that if dexV was ok they they would have used it back in 2000 when mine was new. It was out then.