About a year and a half ago I had this same thing happen to the 6x4 Gator. The bolt that holds the drive pulley on the transaxle broke. Last time I just swapped transaxles from our other gator to get us back up and running. see Gator trouble | Green Tractor Talk . I had purchased a used input shaft to swap out so now we are forced to get it done. The replacement shaft has a larger bolt in it which I found there were 2 different sizes when I looked at the parts book. We got the trans split and the old shaft out yesterday. Now we need to clean things up, reassemble, and swap this transaxle out. Hopefully this will fix the problem this time.