Wow, I thought I was the only one who paid any attention to how they sound for a minute and here you go understanding exactly what I'm speaking of!!! Amazing! You know, now that I think of it..after you mentions a few other bus numbers, I can't recall if you posted those numbers because I really don't remember but the MAN Americana had the normal bus tranny sound, then you had the 4003 and a few in its class that had the regular sound until 3rd gear and 4th gear were applied and both held the power band longer than it should. Listening to the way the engine sound gave me chills. I use to hope whoever drove the bus was running late do they can drive fast because that's the only way you would hear what I'm speaking of. In normal slow transit, running hot or whstever, the trans acts normal. There was another distinctive engine sound the Man Americana made but I wasn't too fond of. The 2nd gear seemed to be thrown off and the rest of the gears wasn't sequenced right.
You know, if the 6300 series Flxible buses were still in service, those buses sound similar to the MAN Americana and the 4003 in some ways. That's the best example I can give. But you are right on the money!!!
5745-5754 all had the cummins voith combo but the gears changed 4 times. 5755-5765 changed 2 times after the first gear. Whenever I save my money, I'm going to look for the buses and hope that they aren't scrapped do I can buy it.
GM....CTA pusses me off when they rehabbed not only the fishbowl GMC bus transmission but they did the same to the old Flyers. The old flyer buses had a transmission that was perfect! You may not have been able to hear all gears change unless the drive was running late or if the driver was on a route with no stop signs or red lights, less traffic and can roll like Ashland Av beteren Cermak Td and I-55. When u heard the final gear, again, I had chills...that's something u didn't hear often, lol! Once they rehabbed the trans, it was easier for the final gear to be heard making it boring. The GM was the same way. Before, GM had the normal 2 gear bus. Some buses sounded like the Volvo streets and sanitation garbage truck when the truck first take off...this was in the 90s though. I wish I would have recorded the sounds so you all would know exactly what I'm speaking of.