Ok this is embarrassing. I just got beat by a 4.6 Stang 2000ish model. Looked stock other than exhaust w dumps. We went from a dead stop, big mistake cause I spun those 235's completely through second. He looked to have 305's and spun some. I went to shift into third and hit 5th but it didn't go into gear. This happened twice and afterwards it either wouldn't go into 5th gear or would just pop out of 5th. All other gears were ok. Drove 5min down the road and it all appears ok now. I initially thought I blew 5th. Is this gear lockout?