1995 7.3 oil leak

[Sparchuleta]

Hello. I bought my first deisel about a year ago it is a 1995 7.3 it has 171,000 on it and it has an oil leak somewhere I can't seem to track down ? I can drive it for about 100 miles or so and it's usually 2 qrts low I just replaced the rear main . I have kept an eye on the hpop and the top of the Gally and there is no puddles building up but after driving it and inspecting it I have a oil drip coming off of the right side of my bell housing but it is not a constant drip it's just wet ? It's got me stumped I don't know where it's loosing 2qrts from a slow drip ? Unless it's burning it. If you guys have any suggestions it would be greatly appreciated

[BIGCREW]

2 quarts in a 100 miles seems like alot to me,with that much leaking you would think there would be some very visible oil somewhere under the truck, is it blowing any blueish smoke out of the exhaust,have you taken off your oil filler cap on the motor to see if you have blowby,if you got lots of blowby then I would lean more towards burning it if blowby is good then I would think its leaking somewhere. good luck with it