ddec34 Posted April 9, 2021 Share Posted April 9, 2021 I have a customer's 2014 Mack with M Drive transmission. I was moving it in the yard and was backing up. When I stepped on the brake and pushed the button on the dash to do to neutral, the bogged down the died. I cycled the key, and the reverse alarm was on like it was still in gear. The dash panel said there was "low transmission air pressure". The truck would not start again because it is in gear. The air tanks are at 100 psi. I pulled the drive line, the thing is in gear. No matter what button you push on the transmission control, it just goes from R1 the N1....but it stays in gear......anyone have a similar issue? Quote Link to comment Share on other sites More sharing options...
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