> (everyone always

> worries about their engine in the winter, what about the tranny?)

I'm not aware of any piston rings sliding up and down across any cylinder

bores in my AT. Nor any chemical pollution from combustion byproducts.

You're trying to compare apples to fish here... You make it sound as if

the whole world is completely nuts for having not switched completely to

all synthetic fluids. (The world is completely nuts, but not on account of

that!)

Engine oil has its functions; the primary being lubrication. Another is

to withstand the elevated temperatures surrounding combustion. ATF's

primary function is to be a hydraulic fluid (apply pressure here, feel it

there). Not lubrication: if ATF is too slippery, the transmission will

fail. Temperatures are also lower for ATF than for engine oil (esp in

turbos). Apples to fish...

You're correct in what you say about ATF being better, but Dexron is

already better than what's needed, and synthetic is thus better than

better.

And I don't know that better than better is really any better (except in

theory). The AT will likely out-last the rest of the car with or without

synth ATF.

- Dave; '95 854T, 111K mi