I just bought one of those gear shift knobs out of the Geno's catalog that has the micro switch in the center for turning your exhaust brake on and off. I took it for a spin and am going back out now and take it off. What a noisy thing that turned out to be. It buzzed and rattled continuously. I'm certain I installed it right. That gear shift just has a vibration in it all the time. If you're going to attach something to it, it had better be tight. This one wasn't.
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