The thing that got me when I replaced mine is that there is a washer on there, between the nut and the block - When I removed the nut, the washer stayed in place, and I put the puller on it (a novice mistake, but whaddaya gonna do?) - after 2 days of cursing and breaking one of the bolts on the puller I borrowed from AutoZone, I stuck my finger in there and pulled out the washer. I was finished with the job in 20 minutes after that. And the nut was on there TIGHT - if you have access to an impact wrench...well it saved me a lot of effort.