Ok just throwing this out there, a lot of old timers swear by it. To soften the street gear so it won't shatter as much, heat in an oven to 425 degrees let cool slowly over a few hours. Poo-poo it or whatever. I didn't bother doing it, I just put the Dana in. 9 is a good rear, but for 1/4 the cost I'll use up my stuff first( maybe in my life time)