Another Disc Brake Question

[1970 Charger 500]

Front, passenger side piston sticks when cold and when going slow, locks up upon braking.
I think it's just a piston problem. Can I lubricate it somehow?? Brake cleaner?? WD 40??
Don't want to replace it!!

[Ghoste]

If it's original equipment, you may not have a choice.  Over time and with a little moisture in the system, the caliper bores can start to pit and give the piston a surface to hang up on.  You should be able to get the calipers rebuilt relatively cheap though.

[moparguy01]

yea it sounds like the piston is hanging up internally, youll need to rebuild, replace, or learn to live with it I guess.