2000 GMC Sierra 1500 rear driveshaft Question
 

I was driving down the road in the snow in four wheel drive and somebody stopped me to tell me i was dragging something. Come to findout it was my rear driveline. I noticed tht my U-joint broke at the rear axle. I picked the driveshaft off the ground and put it in the back of my truck and drive the two blocks home using my front wheel drive. My question is did i hurt anything in the transfer case or transmission. somebody told me not to drive at all. is it bad todrive it with just the front driveline. also when i put the rear driveshaft back in with new u-joints. when i reinsert the yoke one the front end (transfer/tranny side) what do i do just great it well??? any advice would help. thank you!!!:)