AODE tranny fluid

[HISSIN50]

Hello,

Real quick one.

I have read that one can/should run Mercon V in an AODE (from Jerry's articles, etc). But do you guys do it, or stick with Mercon? And if you do run Mercon V, can you add it to Mercon or should one do a complete fluid transfer and run straight Mercon V (are they compatible)? Any other pertinent info is welcome.

Thank you.

 

[bjl95mustang]

Mercon V is a syn blend of tranny fluid. It's pretty much like running syn blend engine oil. I have never head not to mix them.

 

[HISSIN50]

Thank you for the reply sir.

the Mercon V can help with the puter calibration to help with shudder control and shift quality (why it was a TSB on *some* Ford trannies). But I am hoping someone knows definitively whether Mercon III and Mercon V can be mixed. Sometimes the fluid can become unstable if mixed.

 

[wytstang]

I don't think so I remember when I worked at ford a while ago we had to drain it completly then use MV for the shutter issue. I personally don't like mixing fluids besides tranny and PS (only in the PS pump that is).

 

[bjl95mustang]

Just make sure you get as much out of it as you can. If you have a stock converter then take the drain plug out of it.

The best way to drain the the tranny is to take the cooler feed line off witch will be the lower line and hook up a piece of hose to it. Start your car and just let it idle and it will pump the fluid out. Once the fluid stops flowing turn your car off. Add 3-5qt of merc v fluid then start the car again and let it idle till the fluid stops flowing. Then drop the pan and change the filter and add fluid. I have done this and a few ford techs who do aode/4r70w's do this too. You wont hurt anything as long as you dont rev the engine with out fluid in the tranny and you turn the enging off when the fluid stops flowing.

 

[HISSIN50]

Wytstang (Danny?)and BJL, thanks for the replies. I only needed to top it off at this point (added auxillary cooler) and did not know if the two fluids were compatible. I errored on the side of safety, which was confirmed by you two, and used Mercon.

In reading some of the info out there on the AODE's, it was a little ambiguous as to whether one could mix them or not (the underlying point made was that MV could be used, but no mention if mixing was permissable).

When i do a filter or have the pan off, I might try a full flush/fluid exchange. Thanks for the info guys.