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As your original LLCs were partnerships - you woul d need to file a final partnership tax return - form 1065 - http://www.irs.gov/pub/irs-pdf/f1065.pdf - check the box G(2) in the header and distribute all properties to members - final balance should be zero.
The new LLC will pick up depreciation workbook as it was and will continue depreciation the same way.
No any special form required.