Command shift in the D3/D4/RRS/new FFRR is basically manual control of the auto box. Given the way it holds the 2.5tonnes down steep hills I suspect the torque converter locks (like it does in 6th ay highway speeds) behaving very much like a manual does with engine breaking - however I haven't confirmed the TC does actually lock but it certainly feels like it.
Garry
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
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