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cummins

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  1. M

    2021 Discovery 44s engine issues - low RPM and quick shifts- 450HP Cummins

    Hi All, I have a deposit on this unit but it has engine issues. When I test drove it twice I drove it with the throttle to the floor most of the time. It would shift at 1200 rpm so it goes through the gears very quickly. Also, it would never down shift at all even once I eventually got to...
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