explorer buzzing from rear

[danny12]

Hi all, first time on here. I have just recently purchased a 2001 explorer. When i turn the engine off i get a buzzing sound from the rear, thinking it was the fuel pump i had it replaced but the noice is still there, does anyone know what the problem may be.

 

[FourBinLabs]

I think some explorers have load adjusting shocks in the rear. There may be an air pump back there.

 

[1Aauto]

welcome to the site