[ASE Doc]

My 700R4 lost third gear on friday when I shifted at WOT. The trans was custom built 28,000miles ago to survive behind my 450HP small block. I was running it down Woodburn dragstrip when the failure occurred. The first time it engaged third, then went neutral. The second try, there was no third gear. I limped it home the 1.5 miles in second. Besides the 3-4 clutch pack that I understand is a weak link, what other parts might have failed to cause this? What other parts might need to be upgraded to prevent future failures. BTW, I upshift at 6,500rpm.