Quote:
Originally Posted by cRiPpLe_rOoStEr
Besides fuel economy, another aspect to consider is maintenance cost. Allison claims its 3000-Series automatic transmissions have a lower maintenance cost even than manuals on urban transit buses, all while also decreasing brake wear and providing a fuel economy around 4% higher than a manual.
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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.
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)