lost a gallon of oil

[brisenhoover]

I have a 97 1 ton w/ 106000 on it and lost a gallon and a half of oil all over my truck and trailer Friday. Started making a undescribable noise while pulling down the highway @ 70m.p.h. oil guage was fine but temp. was at end of "safe" but not in the red, so I turned off air, took it out of o.d. and slowed down. Temp. came down, noise went away thought all was fine, drove on about ten miles did it again, this time traffic stopped. When I stopped smoke was coming from under hood (oil smoke) and truck was running like an 8 cyl. gas motor hitting on 4. Pulled off the road to find my trailer took an oil bath as well as the truck. Mostly drivers side and whole undercarriage. Assumed block pressurized for what ever reason and blew oil out of the bypass or blow by tube whatever you want to call it. Also appeared to come out of dipstick tube. Transport truck driver was on the lot and told me it sounded like an o-ring on the fuel pump gave out and was letting fuel and oil mix which was pressurizing crankcase and blowing out then. Towed to Cummins and they said front gear housing cover was cracked ( I'm guessing from all the pressure) and they found a rock that had rubbed a push tube (?). That part I don't get, have to ask more tomorrow, but they haven't fired it up yet. Sat. when tow truck came it would barely run. Cummins suggests maybe turbo is bad. The fuel pump was replaced by Dodge dealer at about 40,000. They couldn't time it correctly, after they had it for a month they towed it to Cummins. They got it running good. Later it went to McClain Diesel (local performance shop) to have a "tune up" Been running good for three years so I assume that isn't the problem. It's not some radical 14 sec. truck, just needed a little more pulling power. It is a reputable shop. Any way' ANY IDEAS OR INFO GREATLY APPRECIATED!!!!