08 Alpha rear dif problems

[blindzebra]

Ok I have about 11500 on my truck and the rear dif light along with service 4wd light came on. I took it in and they replaced the electric coil (high resistance) in the locker along with the carrier bearings (worn due to excess heat from coil).

Got it back and 10 miles off the lot the service 4wd light came on along with a blinking rear dif light.

I took it back and they replaced the wiring that goes from my locker button to the rear dif. I got my truck back and 10 miles off the lot the service 4wd light came on with a blinking rear dif button.

They tell me that this has been a common problem(1 out of 5 08 advs) but never to this extent. Any techs have any suggestions?