I have been racing mopars since 1974, never had a trans blowup or even burn one up, knock on wood. Always built my own. I have seen several of my buddies blow up over the years, lucky only minor injuries. With the damage possible to car and humans, it is only smart to use a good drum. I like the aluminum drum with the stainless sleeve, good friction surface and lightweight. The problem is most valvebodies do not hold the rear band in low gear, that plus the stress of not doing a burn out right is what causes the issue of sprag failure. I have used the low band apply valvebody, because it is safer, but in my testing the regular manual valvebody, that does not hold the band is a little faster. The low band was just not designed to be released quickly. Which is what you need for a clean 1-2 shift. Even with the modified low servo, just my opinion.


http://www.tcsproducts.com/media/1/TCS_TF727_Performance_Transmission_Parts.pdf