bɹˈɪɾɪʃ dˌɛzɪɡnˈeɪʃən fɚðə tɹˈæktɚ jˈuːnɪt wʌz dˈaɪəmənd tˈiː tɹˈæktɚ sˈɪks ˈɛks fˈoːɹ fɔːɹ fˈoːɹɾi tˈʌn tɹˈeɪlɚ wɪð "mˈɑːdəl nˈaɪnhˈʌndɹɪd ˈeɪɾi" ɔːɹ "mˈɑːdəl nˈaɪnhˈʌndɹɪd ˈeɪɾi wˈʌn" ˈædᵻd tə dɪstˈɪŋɡwɪʃ ðə tˈuː. .
British designation for the tractor unit was Diamond T Tractor 6x4 for 40 ton Trailer with "Model 980" or "Model 981" added to distinguish the two. .