- Change of Old Turkic *d to /t/, e.g. Sakha atax 'foot'.
- Retention of Old Turkic *d as /d/, e.g. Tòfa bedĭk 'tall', Jungar Tuvan kuduruk 'tail'.
- Preservation of the Old Turkic vowel length distinction. OT short vowels remain short while long vowels are realized as long or as diphthongs:
Old Turkic Sakha horse *at at name *āt aat grass *ot ot fire *ōt uot
- A consonant shift leading to the loss of /y/ and /s/ in many positions: y → s → h → ∅
Old Turkic Sakha Dolgan hundred *yǖz süüs hüüs hair *sač as as