I had Ford do the TSB work on mine on Thursday and then I installed the clutch/slave cylinder line and it worked about 9/10 times. The last time I tried a high rpm run before I got home it still stayed on the floor. The assist spring in the assembly is gonna have to come off and if that doesn't work, twin disc he we come! Ford should have just used the same assembly as the GT500. Which is essentially taking the assist spring off!