The persistent discrepancy between local measurements of the Hubble constant H_0 ~ 73 km/s/Mpc) and values derived from the Cosmic Microwave Background H_0 ~ 67 km/s/Mpc) suggests a fundamental incompleteness in the LambdaCDM model. We propose a solution based on dissipative wave mechanics within a viscous continuum. By introducing a non-vanishing kinematic viscosity nu to the vacuum substrate, we demonstrate that cosmological redshift is a non-linear function of distance, induced by Taylor-Couette-like dissipation rather than metric expansion. Numerical fitting against 2026 data from Cosmic Chronometers and JWST-JADES reveals that a single viscous parameter resolves the tension. Furthermore, we derive a falsifiable prediction: a Vacuum Dispersion (CVD), implying that redshift is frequency-dependent (d z / d omega > 0). This effect is testable with current lensed supernova observations.Keywords: Hubble Tension, Vacuum Viscosity, Dissipative Cosmology, Dark Energy, Alternative, Chromatic Dispersion, Hydrodynamic Spacetime