Does your auto tranny do this?

[Clayson]

ok i dont have a supra of my own or anything but have you checked the tranny fluid anytime soon? if not that may be a posabilaty, and with it getting stuck in gear you might wanna check the filter and flush it all out and every thing like the guy b4 me said but this is just from what i have learned in the 14 years of my life other than that i cant really think of anything that could happen inless the clutch is going out in the tranny or something has broke off and gets stuck in the gear when it hits 3rd and just locks the hole thing up but then it would prolly lock the hole tranny up then and every thing would prolly stop.. good luck with it and that is my advise on that..