Sounds like slide out rollers are damaged or there is something that they are running over. With slide out all the way out, go out and under the slide out room pull down the rubber seal and look to see if you can see the rollers. You might need a flash light.
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Bob & Joan Alexander, 2010 Tiffin Phaeton 36 QSH, 2013 Jeep Wrangler (toad)
Lobo & Juniper (woof, woof)
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