I'm gonna drain and refill my auto tranny on my 95 A340h tomorow morning. It was completely flushed about 20k miles ago right before I bought it but it has 162k miles and I don't really want to flush it anymore. Anyhoo....I went to Autozone this morning and they told me the DEX III was compatible with DEX II. I've read on here before that it's not. So does anyone know for sure if the Dexron III will be compatible with Dexron II that's already in my tranny? I may just go to the dealer and buy their fluid. Opinions? Paul

 

Yes, Dexron III is downward compatible.

 

I do not know for sure but i thought they were compatible,I do know i have done it before....but prolly be better to make sure

 

i remember the guys at napa saying that you can't get Dextron II but Dextron III is the same stuff.

 

If you had it flushed 20k ago, then you have Dex III in there now (unless somebody still had a stash of Dex II somewhere). They don't make Dex II anymore, and yes they are compatible.

 

Redline offer Dex II and its synthetic formula... I like using DEX II more if you can get it, use it.

 

Correction on my above post... Toyota doesn't carry Dex II anymore.

 

DEX III is supposed to be improved. Use that. It really won't matter much though. Most people i have talked to say it was mainly a marketing skeem.