Quote:
Originally Posted by JSH
I guess that depends on what manual transmission Allison is using as a benchmark. If Allison is benchmarking a 4 or 5 speed manual they might be more efficient.
|
For urban transit buses here, nowadays the manuals are usually 5 or 6-speed.
Quote:
|
In the USA, the Allison 3000 series is popular for Class 6 medium duty trucks used for vocational applications. The Eaton manual option would be a Fuller 9-18 speed or Eaton Ultrashift automated manual. The Allison is the least fuel efficient option but the easiest to drive. (As one would expect from a 6 speed auto with a torque converter)
|
I often see medium-duty trucks with 6-speed manuals. Nowadays fewer have been fitted with anything more than a 9-speed here.