I'm thinking about moving over to Red Line D4 tranny fluid and was wondering if anyone has experience with this over Dexron III?

You are going to be in good hands with either, but from what I hear that Red Line D4 is a very good product.

I'm thinking about moving over to Red Line D4 tranny fluid and was wondering if anyone has experience with this over Dexron III?
6 speed auto or 4 speed auto or manual?? They The 6 speed auto uses Dex VI.
The 4 speed auto & manual trans use Dex III or VI

Can't go wrong with the redline though just make sure it's equivelent to Dex VI if you have the 6 speed auto.