{Chrysler 300} Wheel cylinder replacement advice

[Kurt Brueske <kurt.brueske@xxxxxxxxx>]

I could use some advice on whether I should replace all four wheel cylinders or just the cylinder that is leaking?  Full disclosure this is for my ‘64 Imperial Crown Coupe, not a letter car, but figured the advice would also be beneficial to letter car owners as well.

I discovered the driver side rear is leaking and set out to replace ALL the wheel cylinders as a “preventive measure.”  When I checked the condition of the other three cylinders, they all appear fine but I suspect they’re old - “Wagner Lockheed - Made in USA” is stamped on the housing and we all know how few automotive parts are made domestically these days.  

Question:  should I “leave well enough alone” or is there some benefit to replacing all four at once besides knowing they’re new?

I suspect hygroscopic DOT 3 brake fluid was previously used and the car sat for the better part of 20 years…some clumpy viscous residue in the bottom of the master cylinder.  I was thinking replacing all four wheel cylinders would aid in a brake fresh and upgrade to DOT 5.

I appreciate the feedback and help.

Kurt

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