St.Elmo Diesel Repair
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Neutral control?
in Modern Mack Truck General Discussion
Posted · Edited by St.Elmo Diesel Repair
Old post are still read so I would like to comment and hope it helps someone in the future. Replace the shuttle valve part #25156277 , most likely it is hanging up when you flip your pto switch. It allows air to flow into the neutral lockout on rear of transmission. Not enough air or no air will keep drive line engaged. Thanks