4r70w Transmission Fluid Type?

[fordguy]

So I know very little about transmission fluid. Here is what I have found, internet says move to Mercon V. Fred Brown website states to use type F or Dextron 2e, but says do not use Mercon. Local builder recommended Dextron 3 with additive. He doesnt like price of Mercon V. I have no clue why they would be this vast difference of recommendations. Please enlighten me. Long story, short version I just picked up my 4r70 from local builder and I have one ordered from Fred Brown. Not sure which one I will run, but will sell the one I don’t use.

 

[904Bronco]

This is what I have been using...

 

[ba123]

Yeah, you will find a million different answers. I went through the same thing but I think the most important thing is to pick one and stick with it.

I'm sure what 904 recommends above is good.

I use this Amsoil one and it has been fantastic. It won't burn and survived my WAY hot trans cooling issues while I figured my cooling out.
https://www.amsoil.com/p/amsoil-oe-...tomatic-transmission-fluid-otf/?code=OTF1G-EA

Pricey but worth it, imo.

 

[bigmuddy]

Man, the Mercon V is expensive. I just bought some over the summer and was amazed at price and availability at least in my area.
I wasn't aware there was an alternative.

 

[Broncobowsher]

Dextraon/Mercon sold by the oil company of your choice. I've found they really are not picky of who's bottle the oil comes out of so long as it is full and kept clean.

 

[tasker]

Dexron II was replaced by Mercon V a few years according to the big blue Oval

 

[Bruners4]

Transmission shop told me to use Mercon V when I picked it up. I've been buying the Valvoline brand at the lowest price supplier.

Valvoline Mercon V (ATF) Automatic Transmission Fluid | Valvoline

Valvoline Mercon V ATF is the conventional automatic transmission fluid that has been uniquely engineered to extend the life of automatic transmissions in vehicles that specify all Mercon V and additional Mercon applications. Formulated with premium base stocks and advanced additive technology...

shop.valvolineglobal.com

 

[1969miller]

mercron V

 

[EPB72]

If either or both of these builders offer a warranty, I'd ask them what they want used to honor any possible claims..

 

[fordguy]

If either or both of these builders offer a warranty, I'd ask them what they want used to honor any possible claims..

The one I currently have is ok with V, he doesn’t like the price, so he gave me the additive for 3. It is the one I will run for now. I will talk to Fred when he calls me on the one he is building. If I were not so deep in these, I would abandon and go AWD jasper and atlas. And I want to drive my truck sooner rather than later.

 

[spap]

Mercon V, will last min of 30,000 miles full syn, never had any issues with the 4r70w.

 

[widowmaker77]

I’m running valvoline mercon v in mine. Can’t remember right off if it’s synthetic or not.