[T Bird]

Interesting post- I'm planning to R&R the A arm bushings this summer and have already purchased the necessary parts as well as the Porsche tool to remove the castellated nut that secures the ball joint to the A arm. From the above traffic, I have the following questions:

1) What's the problem with using the Porsche tool to remove the castellated nut? Why is a chisel recommended for removal, as opposed to the correct tool? Stated another way, why is the tool suggested only for installation, and not removal?

2) If the castellated nut presents a problem on removal with a normal breaker bar and Porsche tool, I was planning on using the Porsche tool in conjunction with my 1/2 drive impact wrench. Does anyone think that this is problematic? Seems to me that this is the easiest way to bust off the sucker.

Any thoughts?

Thanks guys.