My problem was not being able to shift out of park. My automatic shift lever on my 94 Ford F150 just went loose all of a sudden when I tried to shift into gear. Thanks to this thread I was able to take on this relatively easy repair.
Fortunately, my local Ford guy not only suggested replacing the tube but also the metal rod that goes in the tube. When I took mine apart not only was the tube cracked but the rod was bent. I would not have been able to use the rod in a new tube or worse would have shortened the life. The total cost from the dealer of these two parts was $46 including tax. The job involves disconnecting your battery so you don't accidently trigger your air bag, removing the trim around the steering wheel, disconnect the electrical overdrive connection, remove the pin holding the shift lever in place, there is another pin at the back of the tube that also needs to be removed (pay attention to how the metal lever is positioned) remove the four nuts holding up the steering column and let the column lower and rest on your front seat,
remove the eight #30 torx bolts and lift out the shift tube, reassemble new parts and be sure to lubricate the inside with grease so it doesn't rattle. This took me about 45 minutes to complete. Good luck and thanks to Alan.