Hi Greg,
I think this would depend largely on what the weather conditions are like at this time of the year in your location.
Judging by the way your question is worded, it's my guess that your from across the 'big pond' in the USA, if I'm wrong I appologise!
Here in the UK it tends to be either too wet and slushy or too frosty in most regions in december and it would, I think be difficult to find turf / sod's for sale also at this time.
I think it would be a wise move to check your local climatic zone and the availability of sod's at this time of year.
Otherwise I think what you are planning is a viable option providing that you scalp the old grass right down to the roots and rough up the surfice to give a 'key' for the new sod's.
If I may be so bold, I would like to recomend a fellow ABER, who has some good answers on your type of question and he may also be closer to your neck of the woods to.
Good luck Tbird+
Ps hope CLANAD dont mind me 'Flagging him up'