I decided to try and tackle the job and find out what is causing this. I found that on the outer slide tube there are four wear tabs two on the inside top and two on inside sides. It appears the wear tabs on the two on top were warn away. See Pic. I have ordered new spur gears and wear tabs. We will see what happens.
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Loren and Diana West
2015 3711FL 2018 GMC 3500 Dually
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