rray32539 said:
Mercon SE is the only ATF approved for the TorqueShift, and it is only available from Ford.
But if he's changing 6spd fluid it would be a ZF6 right?
Welcome to SuperDutyDiesel ssd79!
If you have a ZF my manual says dexron/mercron rating. I don't think there's a difference between my ZF and later ones.
I've also wondered if the dual rating mattered in 6spds. From what I've read some people have used it with no problems so far. I chose to hunt down the original formula Mobil 1 ATF since that's what I had changed to when I got the truck.