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Mack RD688 Allison 4500 no shift into gear
Posted to HD/Fleet Forum on 11/23/2012 7 Replies

Intermittantly when you try to shift to either drive or reverse, the display just flashes and the trans won't go into gear. If I scan it while the display flashes it gives me codes 151,152,153,154,155. Descriptions are diagnostic trouble code #1...5. Does anyo... Login to read more.

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