We study the influence of the rotations and vibrations of the symmetric-top RaOCH3 molecule on its effectiveness as a probe for the P, T-violating effects, such as the electron electric dipole moment and the scalar-pseudoscalar electron-nucleon interaction. The corresponding enhancement parameters Eeff and Es are computed for the ground and first excited rovibrational states with different values of the angular momentum component K. For the lowest K doublet with v⊥=0 and K=1 the values are Eeff=47.647GV/cm and Es=62.109kHz. The results show larger deviation from the equilibrium values than in triatomic molecules.