Driving 100

[Unilevers]

allison's come in 5 or 6 speed trims

in all honesty the coach world is 100% different than the truck world. They are not designed to last like a big truck and do much different things. They are designed for average consumers and drive like big cars. The trannies shift more for comfort and ease of use than engine longevity and torque curves. They dont work as hard or as long or as often than a commercial truck does. That big engine is CRAMMED in there and cummins knows full well there isnt enough airflow they just put slightly lowers cals in them and know they wont work as hard for as long and it will be somewhat OK. Ive tuned lots of them, you have to be fairly conservative and at some point the slush box trannies overcome most of the gains you get anyways.

Uni