Mountain driving
Hi All, We are planning an out west trip this year which will include extensive mountain driving. Yellowstone, Tetons, Glacier are just a few of our planned visits. My main concern is weather to...
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The Allison will downshift itself when the ex brake is activated. Also dont pump the brakes as you will deplete the air supply. The proper way is to apply steady pressure to the brake pedal until you have slowed to your target speed and then let off the brakes. Here is an example of how i drive and i drive mountain roads alot. If the hill is fairly steep and long i start the downhill at 45mph and when my speed reaches 50 i then brake back to 45 and let off the brake, repeat at 50. Also your ex brake is most effctive at high rpm like in the 2500 rpm range depending on what engine you have. ISB will be a little higher than ISL. you cannot hurt the engine as it will upshift when it reaches to high of rpm of which should not happen once you learn how it works. I just seen that you have a 450 hp ISL, it should have a 2 stage compression brake instead of an ex brake.
