transfer box

HI I had my FL2 in the dealers today and it seems the transfer box as had it needs a new one.Its being paid for under warranty so no major issue.I was just wondering how the actually work.Is there any electrics involved and if so does any software need to be downloaded i don,t want no issues when i get it back or does it just work straight off the gear box (auto).Thanks in advance.

Transfer box on a Freelander 2 is a pure mechanical device to transfer the power from the gearbox to front and rear of the car

No software update needed

thankyou