Driveshaft damaging my differential

I took my 05 taco into the shop to get my whole hub assembly and cv joints and axles replaced. The mechanic was inspecting and said he noticed when working on it that the driveshaft had been smashing into the differential to the point where it's mushroomed, and that because of the 6in suspension lift everytime I hit a bump it causes this to happen. Now I haven't gone back into the shop yet to look it over myself and gets some more info, which I will be doing later this after noon, but I was trying to see if anyone has had this problem or knows a good way to fix this.

 

Need some photos....

What exactly on the driveshaft was smashing into 'what' of the differential??

 

See that I'm not sure of im bout to go in there shortly and talk to the mechanic and then I'll have more details and I'll definantly let you know. I just thought I'd post it before hand figuring someone would probably already know of a few instances that this might occur.

 

Any updates on this?