I looked through all of my work shop manuals and there is only mention of Dextron Mercon -2 did Dextron Mercon 3 replace 2? is valvoline a good brand to use on a transmission service for my 1992 300-E L6 3.0. automatic transmission.

I am also confused as to the approprate level on the dip stick at which the fluid should be warm at 80C after a 15 minute drive. I noticed my fluid level was a hair to the first line on the dip stick. is the second notch were the transmission fluid should be cold or hot?

Thank You
Bob Geco