Quote:
quote:Originally posted by bigskyjimmy
What is wrong with the stock Allison Grade descend feature??? I put my trans in tow mode AND shift to M and kick it down a gear or 2 with the switch on the gear shift lever with my thumb and the Allison defuels the Engine when the RPM's skyrocket it made me worry that the engine was going to blow but that is what it designed to do I LOVE that feature in my 07 Duramax it works great I see no need to spend the big cash for the Banks brake
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I thought the same thing until how I saw how it worked on my friends 2008 Chev. What a difference.
The new trucks have tow/haul and exhaust brakes. They have added the exhaust break because now braking works better than just tow/haul.