It's not all that unusual at that mileage. Salt and sand in winter driving conditions take there toll. Plus you stated that you have not had any work done on them..... As you may ( or may not ) know, they require the sliders to be lubed at least once a year. I do mine every spring. The lube in this area gets washed off by the salt sand mix. I find them dry every spring. I know I'm using the proper stuff, so it's not the type of grease that's at fault.
Popular topic today! See this post. A more detailed explanation of the above is contained therein.
Dom
Popular topic today! See this post. A more detailed explanation of the above is contained therein.
Dom