Any lube that would stop front suspension squeaking?

Ken71Twister said
I have a 1971 Duster. I had pretty much everything replaced in the front suspension about 25 years ago. I’ve driven very few miles since then but the years have led to loud squeaking from the front suspension. I’ve attempted WD-40 and silicone spray on the rubber parts/interfaces that I can see - but minimal help. Anything I can do short of having everything replaced again? I also used a grease gun on parts that had the necessary fitting.

25 years ago? I think you need to reconsider how long you think suspension bushings should last. Even if the mileage is low, rubber oxidizes and deteriorates with time. Sitting is worse than driving.

If you’ve greased all the joints that need servicing and it still makes noise, it’s probably time to rebuild the suspension.

The other possibility is that something broke, so inspect your k frame welds, pivot tubes, engine mounts etc.