A comparison between Dexron-VI and Dexron-III(H)

[The Critic]

Yep, I think it may be a viscosity issue as the overall viscosity is reduced with DexronVI, which may be an issue with the clearances.

But given that the transmission has about 100K (and is 10-yrs worth of 1-3 mi trips, lots of shifting), its really a toss-up as to whether the upgraded, "slightly less compatible" fluid would cause more damage. Agree?

I think I'll just pour in DexronVI and forget about it. After all, DexronIII thins to the starting viscosity of DexronVI within 10-15K anyway.

 

[Balzybenzy]

For the most part from above and other opinions on Benz world.or, Matthews volvo site.com, dex6 appears to be reverse compatible to dex3 except with better base mineral oil metal treatments - like duralube- n detergents. and there is original dex3 and synthetic dex3, and different manufacturer names makes it more confusing.

This chart is a 3 month search for compatibility answers that manufacturer like mobile could not answer. Is Mobil delvac atf reverse comp synthetic to dex3 and 6? Mobil only knew what label said, mb 236.91 and allison transmissions. Online articles only mention that mob delvac is comp to shell spirax6. From chart, S6 would be dexron6,. S5 is dex3 synthetic, S4 is original dex3 nonsyn.

For volvo specs jws3309 is essentially dexron3 synthetic, and others advise same as Toyota t4 atf which costs $5/L. Matthewsvolvosite.com user caution Mobil 3309 n synthetic ATF caused slippage?

Not all synthetics are backwards compatible to dex6 n merconLV according to best atf website, which rated : Mobil 1, royal purple, Valvoline MaxLife, Castro transmax the top four.
Having some friction and grip on gears is important to switch solenoids, or transmissions will slip -- another reason why metal additives may not be good for transmissions , opposed to engine oil exposed to exhaust n hot gases. See gear video demo on omega oils.Co.UK.

According to elemental ATF assay on this site of Honda, idemitsu , and valvoline maxlife: idemitsu had 400 ppm zinc not great for metal, since negative charge cathodes attract positive charged acids like phosphates, hydrogen, etc... maxlife has 600ppm phosphorous owing to the phosphate oxygen based detergents for cleaning. Phosphates maybe OK for engine oil exposed to emissions and carbon, but for sealed transmission gear I believe is bad, not only as foaming agents, but binding of oxygen causing corrosion. But Maxlife appears universally compatible, and cheap $30can/5L jug, But I won't use this on new or expensive cars, Only flushes.

For transmission you want the best dealer specs so fuchs, motul , pentosin, moly, are dealer brands for a reason. Buy the best if u want 150k miles from it! Use cheap stuff for triple flushes every 100k. Most cars go to 300km+ if we'll maintained.

 

[kschachn]

You resurrected a 14-year-old thread just to bring us that?

You have some nonsense in that post as well, did you just cut and paste from other sites?.

 

[kschachn]

Dont you ever have anything nice to say? Gets old fast.....

I agree, "TeamZero". For a board that is supposed to be accurate technical information it does get old.

You've only been here since September and already caught on.

 

[viscous]

For the most part from above and other opinions on Benz world.or, Matthews volvo site.com, dex6 appears to be reverse compatible to dex3 except with better base mineral oil metal treatments - like duralube- n detergents.

Just don't us Dexron VI in a manual transmission that specifies Dexron III, as per GM below:

DO NOT use Dexron VI in place of manual transmission fluid in any manual transmissions or transfer cases that specify Dexron III, as a failure may result.

 

[MolaKule]

For the most part from above and other opinions on Benz world.or, Matthews volvo site.com, dex6 appears to be reverse compatible to dex3 except with better base mineral oil metal treatments - like duralube- n detergents. and there is original dex3 and synthetic dex3, and different manufacturer names makes it more confusing....

...
Having some friction and grip on gears is important to switch solenoids, or transmissions will slip -- another reason why metal additives may not be good for transmissions , opposed to engine oil exposed to exhaust n hot gases. See gear video demo on omega oils.Co.UK.

According to elemental ATF assay on this site of Honda, idemitsu , and valvoline maxlife: idemitsu had 400 ppm zinc not great for metal, since negative charge cathodes attract positive charged acids like phosphates, hydrogen, etc... maxlife has 600ppm phosphorous owing to the phosphate oxygen based detergents for cleaning. Phosphates maybe OK for engine oil exposed to emissions and carbon, but for sealed transmission gear I believe is bad, not only as foaming agents, but binding of oxygen causing corrosion. But Maxlife appears universally compatible, and cheap $30can/5L jug, But I won't use this on new or expensive cars, Only flushes....

Internet assertions without technical facts are just opinion and that last paragraph contains so many embarrassing errors and incorrect data it is not worth commenting on each error.

I have no idea what you are saying above or your point but had you searched BITOG (Using BITOG's New Search Engine) you would have found the following technical information on the differences between Dexron VI and the Dexron III series: