I changed over from my snowthrower on my X485 AWS to my mowing deck Sunday and it took me more than 30 minutes to get the drive shaft coupler to lock onto the rear PTO drive. This happened once or twice before and it really is ******* me off. I never had this problem with the mower drive shaft on my old 425 and am curious if others have had similar problems. The coupler on my snowthrower drive shaft locks into place with no problems to the front PTO drive shaft but that not the case with the mower shaft. It finally locked into place after rotating the drive shaft to where the U-joint hinge closest to the end was aligned in the vertical versus horizontal position. The coupling is lubed and there is no foreign material blocking it or the star PTO drive.