In this study I present a productive and perceptive analysis of the voiced and voiceless alveopalatal fricatives in lleidatà in order to analyze how yod segregation is used in this dialect. The results obtained from the analysis of 32 speakers allow observation of a variation in the yod segregation of the voiced alveopalatal fricative sounds, which can be explained by certain linguistic constraints. In the case of voiceless fricatives, the results establish a high number of glide outcomes, which is greater in cases related to the written language. A study of the speakers' subjectivity demonstrates parallelisms between the data from production and perception.