Nice truck! Are they 14.00R20 tyres? I've only seen one Tatra up close which was a tour bus, very heavy looking wheel attachment and chassis!
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I think this is the same as a MAN Kat 1, the rear axles have a diff in the flattened "pumpkin", but not between the axles. I wonder why the Tatra does? Super tight turning circle I wonder?
Also a bit O/T, in comparing an old but cheap and thirsty truck to a nice almost new expensive but efficient truck, I worked out that they ended up with the same total expenditure at about 100K miles. Not including Adblue, future concerns about Euro 1 being banned etc etc.