Always read between the lines. Pickup on any hesitations, wishy-washy statements and the like and interact accordingly. Get commitments written down.
Hierarchy is important; bosses throw their weight around. You have to be diplomatic in managing it.
Engineers crave recognition. Give them plenty of positive feedback and incentives. Treat them as equals and they will open up. Once this happens they can become very friendly and often personal but that is the culture.
Finally, make a trip to India and do meet your remote team members. Personal interaction allows you to setup relationships which are invaluable in getting things done.