S550 service.

[ZR]

Posted last year about how quickly diff fluid goes south (especially if tracked) but we are now seeing the same issue with transmission fluid. Seeing excellent results with OE Ford suggested fluid plus MT82 additive.
Shoot Fast Ed a jingle, he can hood you up.

[m_owing]

Planning on changing my ford (non-mustang) transmission and drive unit fluids soon. Along with our Ford hook ups, we have an Amsoil hook up from Amsoil Guy. Some of the amsoil gear oils have the friction modifiers already in there so no mixing required.