  We investigate the behavior of the shear viscosity $\eta(p)$ and the
mass-dependent diffusion coefficient $D(m,p)$ in the context of a simple model
that, as the crosslink density $p$ is increased, undergoes a continuous
transition from a fluid to a gel. The shear viscosity diverges at the gel point
according to $\eta(p)\sim (p_c-p)^{-s}$ with $s\approx 0.65$. The diffusion
constant shows a remarkable dependence on the mass of the clusters: $D(m,p)\sim
m^{-0.69}$, not only at $p_c$ but well into the liquid phase. We also find that
the Stokes-Einstein relation $D\eta\propto k_BT$ breaks down already quite far
from the gel point.
