Multiple sensors on new peterbilt rears

Can anyone tell me what the two sensors on the 2020 peterbilt rears are. I’m sure one is for temperature, but I see a second one on a tubular looking part of the rear which has what I think is an air line connected to it. I’m seeing this in a picture, but the wire is not connected

 

I believe this is an Eaton rear

 

That makes sense but I’m told there are separate lines for that. I have to agree with you AModel. Do you think the air is there all the time and when you activate the switch it opens the valve to let the air lock the diffs and visa versa?

 

Was just in the Eaton website. I’m pretty sure we are right. It shows a breakdown of the whole mechanism. Thanks for the comeback AModel. Keep the shiny side up

 

It’s a brand new truck at the dealer. They probably didn’t want anyone hitting the switch by mistake before it was delivered. When you hit the cab switch it backs out the axle switch which allows the spring to push the inner gears together and visa versa

 

It’s a brand new truck at the dealer. They probably didn’t want anyone hitting the switch by mistake before it was delivered.