Found this on evoxforums:
"I have been saying this for years. I have dealt with every single fluid available for the SST. I only recommend one. Genuine OEM, even when I suspect that other "over the counter" fluids may be close to identical. However the DCT470 does not like the FFL family of fluids.
By the numbers.
1. The OEM's have specific specifications that fluid delivered to them must meet. Over the counter fluids have no such requirement, and as such the fluid may not be identical, even if it is made by the same company for the same application.
2. The SST operates in a "gain" mode most of the time. The slip rate vs pressure rate that the transmission uses to control this slip is hard programmed, and the transmission tends to react poorly to anything that changes the dynamic friction rating of the clutches, even if it INCREASES it. (Dynamic friction refers to the state where the clutches are engaged, but in a controlled slip state, aka as "normal" mode for the SST)
3. Wet clutch friction properties are highly susceptible to change with different fluid properties due to the friction material absorbing the fluid. Even the glue used to adhere the friction paper to the plate effects the properties of the clutch. This change may be permanent if left for a long enough period of time.
Eric"
http://www.evoxforums.com/forums/sho...+fluid&page=49