https://www.amazon.com/dp/B004IQSETQ/ref=cm_sw_r_cp_apa_glt_fabc_3PRYNF6X027QP892ZXRZ?_encoding=UTF8&psc=1
I have been overly happy I bought these. Six point wrenches are a life saver when you NEED one.
As someone who works at a dealership. Most will have no idea how to work on your truck. Unless they have a very seasoned tech. We had a MJ at our dealership and I had to help the tech work on it.
56000428 was the original post number. It was superseded to 56006957. They are discontinued and no dealers show one. eBay, junk yard, or maybe a user in here are you only options .
I had a Posi Lock on mine before I swapped to the 1 piece axle. 2wd low was nicer the one time I used it. The strength and simplicity of the one piece seems worth the loss of fuel mileage.