I'm purely speculating at my speed but it was a highway run with airdam, spoiler, and tokico lowering. I was at about 5700-5800 rpm (roughly)in 5th gear. I don't know really since I was paying attention to the road and my exit was quickly approaching but once I finished beating an Impala SS, I stuck the clutch in and coasted for a bit. As soon as I popped the tranny out of gear, I heard a terrible clanging and was infinitely stuck in 1st gear! Turns out the T5 cant handle those speeds! Or I used the wrong fluid in the tranny....