Luxury Coach Lifestyles - View Single Post - ZF 12 speed Transmission vs Allison 6 speed

MarkofSJC · 11-18-2011, 11:38 PM

Thanks John!
That's an important clarification.
Recently I happened to drive the ZF-12 against an Allison 6 speed, back to back on the identical coach. The ZF was (obviously) in a Newell, while the Allison was in a 45' Beaver Marquis with the identical engine. Even though the Beaver was considerably lighter, it was interesting to see that coach struggle a bit to work up a slightly inclined hill at 50 while the Newell just dropped a gear and pulled right through it.

I guess it's sorta like a bicycle vs a mountain bike ~ they both work, but when you start having a lot of differences in terrain, you want more gears!

11-18-2011, 11:38 PM	#6
MarkofSJC Senior Member Join Date: Jul 2011 Posts: 103	Thanks John! That's an important clarification. Recently I happened to drive the ZF-12 against an Allison 6 speed, back to back on the identical coach. The ZF was (obviously) in a Newell, while the Allison was in a 45' Beaver Marquis with the identical engine. Even though the Beaver was considerably lighter, it was interesting to see that coach struggle a bit to work up a slightly inclined hill at 50 while the Newell just dropped a gear and pulled right through it. I guess it's sorta like a bicycle vs a mountain bike ~ they both work, but when you start having a lot of differences in terrain, you want more gears!