Has anyone used this produce before and if so what are your thoughts about it.

Thanks

 

personally, i would use supertech, or some cheap brand. as long as it says DEXRON V on the bottle, and meets the specs for your transmission,i would try to find the cheapest brand. if you choose to pay 2$+ per qt. of transmission fluid, remember that you are just basically buying the name too. i use supertech alot, and i've never had a tranny go out on me.

 

You need mercon V fluid in a 4r70w transmission. Use the cheap stuff in all the others.
Alan

 

are you sure, i used mercon III in my 94 f-150, and it works fine. it has code U trannsmission, and a 5.0

 

also, the book said use mercon III. would it hurt it to use dexron V?

 

I don't know what dexron V is. The early 4r70w's did not use the mercon V fluid. Ford does still recommend using it in them. It just did not exist then. Here are my thoughts on the mercon V fluid and why 4r70w,axod,and cd4e transmissions require it.
I'm going to start with saying I build torque converters professionally.
Those transmissions have a grooved design lockup clutch with a tapered lockup piston. So that the outside of the lockup piston contacts the clutch first for a smoother apply. This system works to make lockup engagement smooth. It sucks for power. In order for this system that uses minimal lockup surface area on engagement to work ford had to friction modify the fluid. The result is the semi synthetic mercon V fluid. It works in a similar way as adding friction modifer to a limited slip differential. The mercon V fluid has some other qualities that help it as well. It does seem to make electronics last longer.
The only way to not need the modified fluid and get the converter clutch to last is to install a smooth clutch on the converter and lessen or remove the taper on the lockup piston. Ford doesn't do that because it is very abrasive when lockup applies that instantly.
PiperC, On the early transmissions I highly recommend you do some updates to the seperator plate and replace the 1-2 accumulator piston,cap and springs. They were a very well known problem for ford. Your vehicle may have had it done under warranty at some time if you are not having problems with that. Lockup shudder is the biggest problem on these transmissions. It can be fixed but it's not easy and you can't just do one thing to fix it. Part of the fix is to use merconV fluid. Personally I buy only motorcraft mercon V fluid. That way I know I am getting dealer quality fluid.
Hope this all helps.
Alan

 

but will dexron V hurt it if it is not reccomended? just went out to check (BRRRR COLD OUT THERE) the dipstick says "requires mercon oil" and we used dexron III mercon and it works fine, just the hard 1-2 shift. and the tranny shutter, it happened the day we bought it, and has neversince happened

 

Alan,

What would happen do you think if you fill a 99 4r70w transmission with Dextron III.
Would it eat your clutch material?

TIA

 

The dexron III fluid will not eat "my" clutch material because I use a smooth lining. The dexron III fluid will overtime burn the stock ford lining. The fluid will not show an immediate difference it is mostly when the fluid is hot that there is such a difference between the 2 fluids.
Installing mercon V fluid into all 4r70w's whether they had it new or not is highly recommended.
Alan

 

Causing a shudder at 35-45 mph perhaps?

 

never mix your transmission fluid with water

 

Good advice, All of the "glues" used to bond the friction materials inside the transmission and converter are water soluble. Meaning the water will cause the linings to seperate from the backing plates or whatever they are attached to.
Alan