Don't add Trans to diesel, that is an old wives tale, it does nothing for your engine at all. Some of these guys are cracker jacks at fixing things but thats about it. The guys that are building pumps will tell you not to do it and the guys that are repairing them will tell you to do it. Figure it out. Do a search and I bet you will not find one diesel manufacturer or Inj pump manufacturer that will aggree that it is good. Read this
http://flashoffroad.com/Diesel/DieselFuel/about_diesel_fuel.htm#add_oil