130K on the trans now and it just starting to have issues. Yes it maybe OK, but at that milage you should condsider an upgrade. There are several reputable builders out there many recognized in the diesel magazines, sun/suncoast is one of them. You should probably get a built one with a good torque converter while at it. Many now are billet to take extra stress, time to maybe upgrade the rad/oil cooler while you are at it.
The standard trans has been noted over in the ford websites as being the weak link in the system. depending on what you buy look at 4-5K investment. Still lots cheaper than a new $70k truck with payments. With an upgraded trans you can also have some tuning upgrades done, new Y pipe to replace the 7.3 exhaust donuts etc. I think these come from BPD not sure. There have been several articles in diesel world/power magazines on what to do for the 7.3 one is on a dually from tennessee last month or so.
