The TSB is dealing with the properties of the new DexIII fluid that should apply to all units, I have seen DexIII do the same thing in other manufacturers units.

Dex III is basicly a thinner version of DexII that they developed for colder areas.

 

So what is the final conclusion, is summary, on changing the fluid?

 

Drain the fluid in the pan (between 3-4 quarts)

Use Dex/Merc III compatible.

Be sure not to overfill!

No way would I leave dirty burnt fluid in any vehicle I work on .......but I agree I'm not a big fan on flushing ESPECIALLY if the tranny hasn't had frequent fluid changes.

 

So no filter change? My fluid looks pretty good, but I don't have the maint. records. How's about Mobil 1 ATF?

 

The filter in the AW4 is basically a screen. I replaced mine once around 90k and it wasn't dirty and as I change fluid frequently, I haven't pulled the pan to check or replace it again.

But if you have unknown maintenance history, it would be a good idea to take a look.

 

that a bing N-O on the atf...just dex (dex/merc)

 

We are referring to two different TSB's then. The one I am referring to is from Chrysler and is dated Apr 08. They removed the Dex III only criteria for AW-4 service, lumping it in with Chrysler trannies receiving ATF+4. The issue other than ATF+4 being the wrong fluid, is the timing. Chrysler issued a TSB in Oct. 07, specifically exempting the AW-4 from ATF+4 recommendation.

The timing of it is very suspect. Apr 08 would be as the last few thousand AW-4's would be exiting extended 7/70 warranty coverage for owners that purchased '01 models. Most times a Dex III/ATF+4 discussion comes up, certain members of this forum howl and moan about how Chrysler updated the recommendation for the AW-4. But can never produce one shred of evidence that Aisin-Warner or Toyota ever said that the AW-4 should be run with anything other than Dex II/III.