Originally posted by Rob98SVT2663:
I didn't add the Ford Friction Modifier when I did the synthetic MTF switch. I thought that was used in combination with regular tranny fluid? I was under the impression that once you went to an all synthetic fluid, that you didn't need that stuff.
The consensus seems to be that the friction modifier helps the synchros "bite". Without it, the rheological properties of the fluid may not create sufficient friction between the cones for them to synchronize. Since you report shifting is fine after things warm up, I'm guessing it really isn't that big a deal and, as Terry points out, the fluid just needs time to distribute itself throughout the gearset.
Here's what my sources say about MTX fluid:
Fluid type: MERCON ATF
Capacity (Refill): 5.5 pt (US)
Note: When replacing fluid, add 52 ml (1.8 oz) additive, Ford Spec number WSP-M2C196-A Ford part number F3TZ-19B456-MA
And a general note, not directed an anyone in particular: Take it easy on the tranny! Remember the shift lever is connected to a mechanical device that has to follow the laws of physics; it isn't a remote control.
