2000 Jimmy 4wheel drive

[Jimmydriver3]

Hi guys,
I bought my 2000 Jimmy last fall, I used the 4wheel drive last winter and no problems. We are headed into winter again and when I put it in 4 high it shimmys and thunks and pulls to the right real bad. What do you think happened to it?

 

[sledheadak]

check your driveshaft for play,check your axle ujoints,hubs and wheel bearings