i noticed some one had a TRD
short shiffter that was hitting the hand brake. and teh last week mine has done that to but i have twm, then i was trying to set it in reverse yesterday and the hole rigth sside of the gear box was forced up and the 2 screws on the rigth side wsa gone luckly i cudd drive in 1,2,3,4,5,6 only not reverse so i made it home and fixed it. in my case i had forgotten the washers when i innstaled the short shifter and the screws had gone througth the holes becuase of all the bending to the left when i set it in reverse.
mybe your screws are a little lose and thats way you are hitting your hand brake