The present disclosure relates to a structure to minimize vibration and noise; and improve engine durability in a vehicle, specifically in the housing of the transmission system. The housing comprises a rotary shaft and at least one bearing seat that accommodates at least one bearing which surrounds the shaft and support its rotation. The present disclosure further relates to the bearing seat which is configured to maintain proper positioning and functioning of the at least one bearing when the shaft is provided with changes of axial load direction and magnitude, in turn minimizing noise and vibration in the shaft and transmission system.