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The challenge to develop a shifter system that achieves a better comfort on shifting gears in manual transmissions is mainly concerned to the subjectivity of the parameters involved, which are strongly based on perception of each customer. This work aims to explore these subjective quality requirements and identify their relation to engineering design parameters. A revision of previous studies on comfort and quality on shifting gears, semi-structured interviews and data from specialized magazines reports are used to define procedures and samples for experimental data acquisition. The results reveal important connections between quality on shifting gears and some design parameters of shifter systems.