Whilst Psychic Hood do work inside transports (p66), They do not work on units inside transports as you cannot measure range to them. Making Psykers inside transports great.
I'd love to see the evidence for that, rules quote should do the trick.Until an FAQ states this, ya they do. SitW is the joyous exception atm.
P66 does not apply as you are measuring to a model not a unit with Psychic Hood."If the psychic power does not require LoS and has a range or an area of effect that is normally measured from the model using it, these are measured from the vehicle's hull as described in the Embarking section on page 66."
"If the players need to measure a range involving the embarked unit (except for its shooting), this range is measured to or from the vehicle's hull."
Answer to FAQ in rulebook for using psychic powers inside vehicles & pg 66 reference. Reverse logic works for Hoods/Staves/SitW as they are area of effect bubbles in regards to FAQ ruling and the ruling on pg 66 supports it although SitW has been FAQ'd to not do this. GW is not consistent with their FAQs so you cannot extrapolate this ruling across all inferences of psychic defense (i.e. Autarch's can stack reserve bonuses, other races cannot).