In many varieties of African American English (AAE), glottal stop replacement and deletion of word-final /t/ and /d/ results in consonant neutralization, while the underlying voicing distinction may be maintained by other cues, such as vowel duration. Here, I examine the relationship between vowel duration, final glottal stop replacement, and deletion of word-final /t, d/ to determine whether the phonological contrast of consonant voicing is maintained through duration of the preceding vowel. Data come from conversational interviews of AAE speakers in North Carolina, Tennessee, and Washington, DC. Results indicate that glottalization and deletion of word-final /t/ and /d/ are widespread across the speakers in the analysis. Additionally, the duration of vowels is significantly longer before underlying /d/ than /t/ for consonant neutralized contexts, thus showing that duration, normally a secondary cue to final voicing, may be becoming a primary cue in AAE.