The bushings in the suspension of explorers are "lubed for life" = no zerk fittings
I've fought multiple rounds of squeeky A-arms and shock bushings. PB Blaster is not the right tool for this job, it will attack your rubber bushings (long term). You'll need a grease gun, a needle fitting, and some "red grease" (technical name I know). Carefully cram that needle fitting in between the bushing and the steel housing, and put a few pumps. Repeat all the way around the car.
It's not an easy lube job...
