This paper presents a method applied in the development of an optimized transmission rubber mount of a midsize Diesel pickup. The focus of this optimization were to improve the vibration insulation and consequently improve the NVH (Noise and Vibration Harshness) quality of the vehicle. The paper describes the basic mounting design and manufacturing constrains, the simulation modeling basis, inputs required to perform the computational simulation, the experimental method used to extract the center of gravity and rotational inertia of the powertrain and a general mounting tuning strategy. The mounting dynamic simulation results for the optimized version is also presented compared to the original one. In order to quantify the noise and vibration improvements, the internal noise and vibration transmissibility levels were measured and compared in percentile reduction basis to current vehicle levels Copyright © 2001 Society of Automotive Engineers, Inc. Stuecklschwaiger, W., Ronacher, A., Optimization of Engine Mount Parameters by Simulation and Statistic Techniques (1994) European ADAMS Users ConferenceZavala, P.A.G., Pavanello, R., Vibro-Acoustic Modeling of Vehicle Interiors and Exteriors Using the Finite Element Method (1998) SAE Brazil CongressPinto, M.G., Nogueira, F., Siqueira, L.P., Development of a Simplified Procedure for the Determination of the Mechanical Properties of Heavy Trucks Engine Mounting Systems and Their Effect on Comfort and NVH (1999) SAE Brazil CongressMeriam, J.L., Kraige, L.G., (1987) Dynamics - Engineering Mechanics - Volume II, , Second Edition, John Wiley and Sons