Hello, just an update. I think I may have found a rearend locally here near Roanoke. This guy has a ton of Macks and the license plate of his pickup is 1MACKMAN. The question is, the brakes on the rear I found are supposedly air only. I have not had a chance to check my backing plate to see but, can the air only?? brakes be changed with the air over hydraulics on my current rear with little modification. I know many people on this site are not fans of the "French" Macks but, I finally got a Mack (foreign or not) and I need to get'er fixed. Also, the question was raised by another local yard about the IH1700 & 4700 rear had either a cable activated parking brake or a transmission parking brake. They thought that it would be way too much trouble to retrofit the rear in mine. I have an air parking brake at rear. Thanks for any help. P.S the name of the yard is Walker's Used Trucks and Parts, 540-365-7144. I dealt with Billy Walker today and he was great. We rode around in the 3 day rain mud in his frame broke Nissan PU and it went everywhere. He went to each of the dozen or so midliners he had and showed me everyone. He also has some 2008 Macks that are cab and chasis only trucks that the Government took out the running gear and lights our and put them on different bodies to make them mine-sweepers. (Can't believe we are buying Scandinavian trucks to strip down and use overseas but, the Gov. must be smarter than me) Anyway, thanks for any help.