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Has anyone ever looked into putting the newer axle tech axles under a m939 series truck? You can get them with air lockers, disk brakes and even a tighter steering angle I've heard. They sound pretty nice but I've not heard of anyone doing anything like this and I'm curious if it'd even be...

Just bought and m936a2 wrecker that's been sitting got it re primed and started today and it runs good but only builds air pressure on the secondary side breaks won't unlock can't hear any real air leaks but one that I fixed behind the cab I don't have any real experience with air...