roadside

See attached pic https://shop.tesla.com/product/roadside-safety-kit

On a trip from Calgary to Alaska and my 2003 LX470 started the N to D and N to R clunk. Not super bad, but worse when hot. Read all we can with limited cell signal, so have seen the common causes. Question is what are our odds of making it 2000 kms? And second, can I disconnect the drive shaft...