dreamcar98z

My brother is a service mgr for a Cadillac dealership. He was wondering what the word in the street is about Dexron 4. It is the fluid going in the 6 speed automatics. He claims that transmissions using dex 3 can also use dex 4, however the reverse is not true. He did say that he read the breakdown on this stuff and in terms of cooling and all other aspects it is far superior to dex3. Anyway, he just wanted me to throw this out there and see what the word is.

buffman

iTrader: (9)

there is no Dexron 4, only Dexron 6. The newest Dexron fluid jumped from Dexron III to now Dexron VI

dreamcar98z

It was a late conversation. The stuff is apparently pretty new, perhaps he got the numbers crossed.

buffman

iTrader: (9)

Perhaps. I havent read much about it. As of now I do believe you can only get it at the dealers.

Scoggin Dickey

iTrader: (34)

Advance Auto Parts has it already from Valvoline IIRC.

Formulated

iTrader: (16)

You can buy dexron 4 from Redline.

I think development and release for dexron 4 was a bit slow and dexron 6 was specified before any momentum was built up behind dexron 4.

TJ

iTrader: (10)

id run III.
its been PROVEN for YEARS.
dont let a 2 dollar qt of fluid be a guinea pig for a costly rebuild.
my .02

HD1911

iTrader: (13)

i think he is thinking of Dexron VI. It came factory filled in all new GM cars with the Hydramatic 6speed.