One thing that will help is to do slow figure 8"s in a paved parking lot, Ford suggests 10 slow figure 8"s. The figure 8"s causes the clutches to open up and unload, That lets the modifier get between the clutch plates and the friction discs faster. Ford also recommended this to be done yearly (according to the Service Manager at one of the dealerships I worked at that used to work at Ford back in the 70s.

In answer to Mopars4ever, the modifier allows the clutch discs to slide on the clutch plates, I suppose too much probably isn't a good thing, but the question is how much is too much? The bottle posted earlier is 4 oz, given how much lube is in the diff, I wouldn't think 2-3 bottles would be too much, but if you approach 25% modifier, I suspect your looking for trouble. Gene