2004 8.1 gas fleetwood trans shifts hard

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dexron

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Apr 28, 2013
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have a 2004 fleetwood 8.1 gas allison 1000 shifts hard intermitely has code po746 trans was out nothing wrong inside fluid was cherry
can not clear trans adapts sometimes get no communication from snap on modis
 
From what I can find online, PO746 indicates a non-functional Pressure Control Solenoid. You say you have verified that nothing is wrong internally? If so, that would suggest an false error report, meaning an electronic problem with the tranny controller. I don't know enough about it to suggest anything more - it sounds like you have more expertise in this than I do!
 
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