"Ticking" sound in roof

[chartquist]

OK this is an odd one... has anyone noticed a ticking sound coming from the roof over the cargo area? It only happens when the Explorer is in the sun. I think what I'm hearing is different rates of expansion/contraction of perhaps the materials in the roof rack, the antenna, or the hatch. I don't think it's a problem, but something I definitely hear from time to time. Or maybe it's all in my head.

 

[cwescapexlt4x4]

Mine does this from time to time with the rear air on, have you checked to see if you turn off the rear air if you still get the ticking?

 

[chartquist]

Mine does this from time to time with the rear air on, have you checked to see if you turn off the rear air if you still get the ticking?

I almost never use the rear air, so it's unrelated in my experience.

 

[chartquist]

Some more info... I was filling up at a gas station today and the car was in bright sunlight today. I could hear the ticking from outside the vehicle. I think it might be the spoiler expanding in the sun and rubbing/grabbing on the rear glass. Either that or the aerodynamic trim caps between the rear glass and the side glass by the 3rd row.