Just proves you never stop learning :D

From Rave

The fluid cooler has a thermostatic valve which is opened by transmission fluid temperature. The thermostatic valve
is opened at a transmission fluid temperature of between 91 and 95°C (196 and 203°F) and allows engine coolant to
flow through the fluid cooler.
So I guess post#4 wasn't a silly question then.;)
 

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