In traditional Yiddish dialects, the presence versus absence of word-final rhotics after unstressed [3] in adjectival suffixes carries a heavy functional load, making distinctions of gender, number, and case. Belk et al. (2019) note that some Yiddish speakers with uvular rhotics do not fully articulate them word-finally, endangering this crucial distinction and perhaps contributing to the loss of gender and case in the Yiddish of contemporary Hasidic communities. This study analyzes adjectival endings in publicly available recordings of four speakers with uvular rhotics. The majority of speakers generally do not produce an audible [R] or [] before consonants, but for these speakers, an underlying rhotic conditions lower F1 and sometimes higher F2 in the pre-rhotic vowel [3]. These formant differences tend to be relatively consistent over the course of the vowel, suggesting that they are phonologized, rather than a phonetic effect due to coarticulation with a following uvular rhotic whose articulation may be covert. Word-final [3] similarly exhibits lowered F1 and higher F2 before a word starting with [R] or a dorsal fricative [x/ü], suggesting that coarticulation with a following dorsal is the phonetic precursor to the phonological effect observed for underlying rhotics.