  We report on time-resolved broadband transient reflectivity (tr-bb-TR)
measurements performed on a bulk single crystal of T$_d$-MoTe$_2$ as a function
of the incident pump fluence (F). Tr-bb-TR data unveil photoinduced electronic
changes progressing on the sub-picosecond timescale as well as the dynamics of
the coherent low-frequency $^1A_1$ interlayer shear phonon. Our results
indicate a gradual evolution of both the TR and the $^1A_1$ Fourier intensity
spectra as a function of F, ruling out the threshold-like change that has been
associated with the ultrafast photoinduced $T_d \to 1T'$ phase transition. We
also observe a large redshift of the $^1A_1$ Fourier spectral features, which
suggests that large renormalization effects are taking place on interband
transitions that are dielectrically susceptible to the $^1A_1$ interlayer
phonon displacement.
