D200S, D200D, D501, D502, D506 – 2-stage differential torque converter with either a single, or low and high speed gear range(s) and optional hydraulic retarder
D851 three-speed with integral retarder and torque converter
D851.2 / D863 / D854.2 / D864 / D864G – three- or four-speed with integral retarder and torque converter
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