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will an open diff spin em both

  #16  
Old 05-11-2013, 06:26 AM
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EPNCSU2006
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Originally Posted by SideWinder4.9l
That makes perfect sense; Except that in my truck, when decelerating, it's like you literally flip a Jacobs Engine Brake on Stage 1....

After a certain rpm (About 1,200) it is like you turned the switch back off.

My logic tells me something "Else" is going on, on top of what you said.
You might be feeling a fuel cut. My truck takes a few seconds of coasting in gear to begin the fuel cut, but it turns off the injectors to save fuel then turns them back on when the engine speed gets back down near idle.
 
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