I had to replace on of these tubes (but not both) on my MX6. I was in a hurry and just went to the local JD dealer. One tube was about $80, ouch. If anyone knows of another source that would be nice if it ever happens again. The tubes are press fit into the yoke, removing the pin was easy, but the tube was pretty stuborn. I finally cut of the end of the old tube, ground it down a bit and used it to drive out the tube from the yoke. I cut a hole in a 2X4 the size of the tube to hold the assembly on some saw horses while I drove the old tube out of the yoke. Then the tube came right out. I also replaced the universal joint while I was at it, I saw that as cheap insurance. Good luck.
