I have an Allison MD3500 behind a Cummins ISL8.9 engine.
It never had exhaust brakes fitted to it , Can anyone tell me if this can be done or is there a reason its not been fitted ?
Second question , If i lose brakes on long downhill runs or get brake fade , can i downshift using the shift selector to knock off speed or could this damage the transmission ?
I have owned manuals for many years so pardon my ignorance on the Autos.
It never had exhaust brakes fitted to it , Can anyone tell me if this can be done or is there a reason its not been fitted ?
Second question , If i lose brakes on long downhill runs or get brake fade , can i downshift using the shift selector to knock off speed or could this damage the transmission ?
I have owned manuals for many years so pardon my ignorance on the Autos.