Well went to the track friday night and during every burnout(4) I would here my tires spinning and then my rpm would shoot up and I would hear nothing. On the last burnout I looked and my speedometer was at 50 by the end of the burnout. During the burnouts I would ease in to the throttle at first and then push it(about 3/4 throttle). Trans temp never went over 150. Any ideas what could be causing this?