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Cruise and engine brake out


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I have searched the internet I read all kind of forums and blogs I have no diagram and the ones I find don't look right. My cruise control and engine brake are not working I checked the fuse panels they all look good I have an automatic 2010 pinnacle MP8, CXU 613 I believe are the numbers someone please help I just need the location or something to look at where to look I own this truck and just trying to get by, so taking it to an expensive mechanic is kind of out of the question right now. I hold 45,000 lb the other day and without that engine brake I was flying! Anyway thank you for anyting any idea where to look.

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Can't help you, but on Allison automatics you can set the max allowed gear with the arrow buttons.   A must with an automatic when driving steep downgrades.  Just keep your speed down and use the snub brake technique til you find the problem, don't want anyone killed.

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