Brake fluid is an entirely different fluid than 'A' transmission fluid. Both for hydraulic applications I suppose you could conclude but still entirely different. Where Chrysler made the switch, I guess the question is whether a 1963 brake fluid system can be entirely cleaned out and retrofitted to Type 'A' and would this be a good change or an upgrade? Rubber compounds used in hydraulic brake systems and intended for contact with DOT 3 brake fluid will swell and therefore be destroyed if introduced to transmission fluid. Mixing DOT 3 fluid with Type 'A' or other I would think would make a mess. Warren Anderson Sedona,AZ Hi All, I remember back a few months ago there was discussion about the correct fluid for the conv. top system. My 1963 Chrysler Service Manual - Use Heavy Duty Brake Fluid My 1964 Chrysler Service Manual - Use Type A Transmission Fluid I have been using brake fluid in my '63 300 Conv, but I wonder if someone at Chrysler determined that transmission fluid was a better fluid and, if so, why? I am pretty sure they are the same pump for a few years. Any ideas? Regards, Mark Lindahl '63 300 Conv. [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/