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#498219 - 09/19/02 01:25 AM Dextron III
westex39 Offline

Registered: 09/04/02
Posts: 421
Is Dextron IIIE transmission fluid part synthetic?

#498220 - 09/19/02 02:06 AM Re: Dextron III
MolaKule Offline

Registered: 06/05/02
Posts: 14954
Loc: Iowegia
For most OTC Dexron III transmission fluids, they have conventional bases or blends of
conventional and synthetic bases. Some are even Group III bases now.

Dexron III is a great improvement over the older Dexron ATF spec as it has a wider temp range, better oxidative stability, and higher viscosity indices, such as 180-200. It is also a 0W20 spec.

#498221 - 09/19/02 05:20 PM Re: Dextron III
jjbula Offline

Registered: 07/04/02
Posts: 479
Loc: Montgomery, AL

You are wise on ATF. I've seen Dexron III that was not synthetic blend.

Do you know why Mercon V is always a synthetic blend? I suspect it is for the flow properties at -40c, but am not sure.

Why is it better at preventing shudder?

#498222 - 09/19/02 08:14 PM Re: Dextron III
MolaKule Offline

Registered: 06/05/02
Posts: 14954
Loc: Iowegia
Golly JJ, don't know for sure but full synths resist oxidation much better and Ford has one heck of a qualification test. Could be the synth's are only one that qualifies.

Many of the late spec'd ATF's also have certain additives for the internals that work with particular trnasmission.