Originally Posted by o1marc
Because of the mountains in Colo. the buses do usually have bigger engines and more importantly better transmissions to handle them. I would stay away from anything with a Cummins5.9 and or a Allison AT545. General consensus is that buses newer than 2005 have electronics that may create hard to diagnosing expensive repairs. Stay away from anything with excessive mileage(over 300k) Colo. doesn't use salt so rust appears to be a non issue on Colo. buses. DT466/Allison MD3060 is what I have and is a desired combo.
I'd take a 5.9 Cummins over a 444E. But yeah the 545 is definitely a drag on the highways.
I'd avoid anything newer than 04'.
Hard to beat a DT466 or Cummins 8.3.
Buying a bus in CO isn't a guarantee of getting a high HP engine or a beefy transmission. I got a shorty from Aurora and it had a 175hp 444E with a 545. Also had nice highway gears in the rear @ 4.10 .
If you do get a real mountain bus from CO it will also very likely have a driveline retarder which is great.