I'm not familiar with the Catalina 25 but I'm wondering that if you keep the keel up while trailering if something did not get strained going over the road. It's generally a good policy to lower the keel onto the bed of the trailer while trailering to relieve the strain on the cable and the winch load bearing points. Having said that, the first place to check is usually the pivot bolt.
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.