cfd511 Posted February 19, 2019 Share Posted February 19, 2019 I have a 2001 Mack RD688 dump truck which was county owned at one point . I don’t know how it felt when it was new but it seems really difficulty to shift all the time. It’s always grinding . The tranny is the 18 speed maxi torque connected to the Mack 400 . Is this normal or should I get it looked at. Quote Link to comment Share on other sites More sharing options...
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