Originally Posted by
masi61
I was going to spray some PB blaster into the internals to see if anything gets freed up as I sweep the shifter through the upshift and downshift modes.
I'm curious if anyone has successfully used PB Blaster spray for this application. I thought there were stronger solvents in it compared to WD40. I don't want to damage any delicate mechanisms but I do want to break up dried grease if this is the issue. Thanks for any help.
WD40 and PB Blaster are similar in composition. They both contain about 75% mineral spirits (aka “Stoddard solvent”). They both contain a mineral oil. PB Blaster has a surfactant which may aid in penetration of the iron oxide (aka “rust”) structure which enhances its ability to free up rusted parts. It doesn’t contain anything that actually removes the rust contrary to information you’ll find on line.
If you have both, I’d use the WD-40 mostly because it smells better. Both have a fragrance added but PB Blaster’s fragrance is rather unpleasant in my opinion. If you only have PB Blaster, it will work just as well. If you only have WD-40, I wouldn’t run out and buy PB Blaster for this purpose. Neither will really work significantly better than the other.