Fabtech Lift Install Question

[Pittbullcpt]

I recently had a Fabtech 6" lift installed by a reputable Fabtech recommended shop. I have a recurring problem with one side of the lift in the rear being two inches lower than the other side. I have the air lift suspension and if I use the lift option to raise the vehicle it levels out perfectly but the one side lowers back down after hitting 30 mph. I am bringing it back into the shop to have them work on it agian but I am hoping to point them in the right direction. It would seem to me that they need to somehow get the higher side to come down, any idea why the one side would remain fully inflated?

[Pittbullcpt]

I recently had a Fabtech 6" lift installed by a reputable Fabtech recommended shop. I have a recurring problem with one side of the lift in the rear being two inches lower than the other side. I have the air lift suspension and if I use the lift option to raise the vehicle it levels out perfectly but the one side lowers back down after hitting 30 mph. I am bringing it back into the shop to have them work on it agian but I am hoping to point them in the right direction. It would seem to me that they need to somehow get the higher side to come down, any idea why the one side would remain fully inflated?