[rheavn]

The last time I was at Newell I spoke with Chuck and asked this question. He said that the Allison was preferred by most. The ZF was most effective if you are in a mountainous area, but for flat highways the Allison was preferred. Bill had the engine change right. Cat is no longer participating in the over the road market due to emissions standards. I'm surprised Newell hasn't gone back to the new Detroit Diesel engine, but Chuck did say they were looking at it.