Exhaust or jake brake or neither?
How do I know if I have a jake brake, an exhaust brake or is it possible that we don't have either of these? We have a 2001 holiday rambler imperial with an Allison 3000 transmission. Am extremely...
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A word of caution...the exhaust brake should NOT be used in rain and/or snow. Also, usually it will not engage if the cruise control is ON.....
To the OP...when descending a grade, engage the EB as your speed picks up...the brake will engage and the shift PANEL will show 2,3 or 4 depending on how your rig is configured. (a simple adjustment can be made to the computer to change it to whatever gear you're comfortable with) but the tranny may not shift down immediately. If it does not, and you are still picking up speed, hit your service brakes by jabbing the pedal..this will usually cause the tranny to downshift and your coach will slow. Once you get the hang of it, you will rarely use your service brake going downhills. Just remember to use the jabbing method on the brake pedal. You can stop by your local Cummins or Allison dealer and they will look over your coach and advise you what exactly you have and how to use it properly....Dennis
To the OP...when descending a grade, engage the EB as your speed picks up...the brake will engage and the shift PANEL will show 2,3 or 4 depending on how your rig is configured. (a simple adjustment can be made to the computer to change it to whatever gear you're comfortable with) but the tranny may not shift down immediately. If it does not, and you are still picking up speed, hit your service brakes by jabbing the pedal..this will usually cause the tranny to downshift and your coach will slow. Once you get the hang of it, you will rarely use your service brake going downhills. Just remember to use the jabbing method on the brake pedal. You can stop by your local Cummins or Allison dealer and they will look over your coach and advise you what exactly you have and how to use it properly....Dennis
