Transmission fluid?

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Not sure if you will benefit from using syn trans fluid over the new DVI fluid. Not sure how syn fluid is in an Hummer, but many I know who tried it in auto vettes, flushed it out and went back to DIII. Shifts seemed sloppy. Again, this is for experience with Vettes, not H2s and the shifting is different.

[tomp]

Should at least run cooler, but I would like to see it for myself (as I have done on the syn motor oil).

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Hey guys, my '06 says to use the new D-IV on the dipstick & in the manual. If their flush system is hooked up to a bulk container of D-III, I am wondering how this is going to work out. Input appreciated...

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Originally Posted by tomp

Hey guys, my '06 says to use the new D-IV on the dipstick & in the manual. If their flush system is hooked up to a bulk container of D-III, I am wondering how this is going to work out. Input appreciated...

I will guess, that most GOOD dealers will use only DVI in the future. DIII will eventually runout via GM service parts, if not already gone. DVI can be used on all older GM vehicles, except for Saturn S-Series, VUE V6, CVT transaxles, and not sure about SAAB.