Dyno'd my car yesterday and on the last pull it won't come out of 4th. I popped the shifter real hard and it came out. I drove it down the road and it ran great till I came to a stop. Then it was stuck in first. Got it out of first and made the return back. When I was coming to a stop it got stuck in 4th again and now it won't come out at all. Clutch works perfectly so i know it's not that... any suggestions?