Update on rear brake/axle sound .. whine sound ...

[Hmmm2]

Can any of you tell me if you EVER hear ANYTHING coming from the rear when you brake hard? We've been on a trip for a week .. left the H3 with the dealer/service dept ... hoping they could find the problem with the SAME left rear 'grind' sound when I come to a quick or hard stop. As you may recall, they had the H3 for almost 2 weeks trying to find the problem ... they replaced the pads and resurfaced the rotors. The sound went away for 12 days and came back. There is a periodic whine .. and the same 'grind' sound coming from the rear. I took him for a test drive a week ago AGAIN and he heard it .. saying it could be the rear axle or drive shaft. I called the Service Manager today (Friday) for an update. He said he opened the axle and didn't find any damage or metal. He said the sound I hear is normal on all H3's. Of course, he didn't say that when he took the test drive with me last week and said he heard a definite problem. Then he said maybe I am braking too hard when I'm 'trying' to hear that sound. I have an automatic. I hear the sound when I come to a quick stop. If any of you have an automatic .. could you PLEASE do a test and come to a fast stop and listen hard?? Do you hear any sound like a grind from the rear just as you come to complete stop? I'll be seeing him on Monday for a test drive again. Why I don't know. He said the sound is there if you brake hard. I told him if I hear it, I will not accept it. Any advise, anyone?? Should there be a sound? Should I contact someone from Hummer? We won't be back home til Sunday. AGH!!!! Thanks.