Simonsaygofast

Hi Im importing a V6 auto, 2006 standard model, do I need an additive when I change the trans fiuld? Some Chrysler models require an additive when you drop the pan, just wondering if it's the same for Mustang thanks .

08'MustangDude

I am not sure what it is, but when I had ford change the fluid in mine, one
of the line items just said "Transmission service and Conditioner." So, do not
know what the conditioner is. Normally, nothing else but trans fluid goes
in.

Derf00

a 2006 auto transmission 5r55s uses standard Mercon V fluid. That's it, no other conditioners or additives needed.

That being said, it's been said (mainly by the mfg of the additive I'm about to mention) that you can add this stuff for additional protection and it's supposedly endorsed by many car mfg's. Don't know about Ford specifically but Honda, Acura etc.

http://www.lubegard.com/~/C-112/LUBE...uid+Protectant

http://www.lubegard.com/pdfs/HeatChart%28AL-516%29.pdf

I'm not one to recommend additives for the sake of recommending them. Transmission fluid has a finite life and adding something will not change that. If it did, OEM's would be all over it and sell it to you direct.

If you want to extend the life of the 5r55s two things. Improve the cooling by getting a secondary tranny cooler and replace the fluid at regular intervals (30-40K miles). The addtional tranny cooler is probably not a big issue since you are in england but here in Arizona...it's a must.

08'MustangDude

Usually, you add a medium duty trans cooler, AFTER the radiator, if this is how it's set up.
Trans fluid to the rad, out of the rad, into the cooler, out of the cooler, to the trans. My '08 has
a separate cooler, it does not go through the rad first. It is not very efficient, because the
temperatures fluctuate from idle to moving. My '07 Charger was the same way, but it had a
larger cooler.

So, now, you have to go from the factory cooler, to the secondary which you will want in FRONT
of the condenser. It would be nice to put it down at the lower grille opening, so you can add
a cooling fan behind it, using a thermo switch kit. This way, you can keep the trans temps
down to ~170 - ~180 degrees. Or, buy a rad with trans cooler connections, reroute there first, then
to the factory cooler.

outceltj

Id suggest getting a larger transmission pan. You would be able to check your fluid as well with the extra capacity

08'MustangDude

The PML Deep pan was discontinued, and this one had cooling fins.


Trick Flow sells them, $300+, with a new dip-stick tube and dip-stick.


Can check eBay, Amazon...