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I used to drive an E9 Superliner with a 12 speed Mack and it literally used to shift itself, LOL It would just fall into the next gear on it's own. But at least it did it at the right time, LOL

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You're right. My uncle drove a new Super-Liner in '88-'89 for a construction outfit he was working for. It was an E9-500/12 speed. From the get-go,it would jump out of certain gears. Mack had a recall on them and the fix was the dampener. He said it worked okay,but thought it was kind of goofy. He had to learn to shift that trans differently, but it did work.

 

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IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA

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