[Pete W.]

I had the same symptoms you have. In preparing for a cross country I too changed all the fluids and then the transmission would grind. After talking with everyone I knew I called MODEL A MEDIC 316-619-1821. He works on cars and sells parts. He said every parts supplier has their own formula for 600 wt. Mine was to thin allowing the gears to spin and not mesh. He sold me 600 wt. from VINTIQUE knowing exactly what my problem was and said I could add some STP also. I guarantee this is your problem! Very nice guy to work with. He saved my butt!