Thanks, Napa's online info says for 58, the 4497 is for if it as a 3/4 or 1 ton chassis. They list the 4000 for the 2 ton. Difference is 3" longer and the one end is threaded for a nut instead of having slots for a keeper. I think I'll crawl under both mine tomorrow and see if the shorter one will work on the rear as well as see if the 1" shorter ones will work on the front! Napa has the 4900 for 11.43 instead of almost 46 for the other one! Same with the front numbers you gave me, the 25664 is 13 instead of 46!
