Did you know that as a fleet owner or repair shop that you can call certain manufacturers directly for technical support? Here is a list:

WABCO ABS System
~ 855-228-3203
~ https://www.wabco-auto.com/aftermarket-services/

Bendix ABS Systems
~ 1-800-247-2725
~ https://www.bendix.com/en/servicessupport/servicessupport_1.jsp

Eaton Transmission
~ 1-800-826-4367
~ http://www.eaton.com/Eaton/ProductsServices/Vehicle/Transmissions/index.htm

Daimler Chrysler Customer Support Center (Covers Freightliner, Detroit Diesel, & Western Star)
~ 1-800-445-1980

If you have some more, add them to the list!