The distribution of variants of the face and goat vowels in Tyneside English (TE) is assessed with reference to the age, sex, and social class of 32 adult TE speakers. The effects of phonological context and speaking style are also examined. Patterns in the data are suggestive of dialect leveling, whereby localized speech variants become recessive and pronunciations typical of a wider geographical area are adopted. Within this broad pattern, however, there is evidence of parallelism between the vowels in terms of the relative proportions of their variants across speaker groups. It is suggested that pressure to maintain the symmetrical structure of the underlying phonological system is guiding this process. Labov's (1991, 1994) principles of chain shift are discussed in this connection. However, it is argued that the patterns in the data are more plausibly explained by considering the social significance of each variant instead of making reference to variants as socially neutral expressions of abstract phonological categories.