On my 2004 Sig, with the 525 ISX, the 2 stage jake has high and low. It definitely feels different between the 2 settings. I use low most of the time when slowing down, and I use high when I am trying to maintain downhill speed in the mountains where I want to stay off the service brakes. I love the 2 speed brake, it is one of the things that sold me on my coach. We live in the the mountains and "leaving town" involves a trip down on of the three roads off the mountain. The one I use the most has some steep switchbacks and steep downhill sections. There I use high and hardly need the brakes.
Let me know if you need more help. Also of note: mine has a side panel switch for high and low, and I use a foot pedal to turn on and off.
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Originally Posted by allbrand1999
I have a few questions about when and how to use (jake brake). I have used it but it sounds to me like all it does is down shift the transmission gears? I have two settings I believe one is used when you are going fast like exiting the free way and the other is when you are going slower. Any advice would be greatly appreciated .
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