I know the propeller shaft to the front diff from the trans was updated due to chattering and looseness. I personally haven't heard anything about the front axle shafts being noisy, but that doesn't really mean much. A simple check under the machine would tell you if the propeller shaft was updated (or pop the bed up and check the shaft on the left side of the transaxle that runs at a slight angle to the front differential). The old setup used a small diameter shaft, roughly an inch in diameter, with pin on couplers at either end. The updated shaft is about double the diameter and is painted white.