RE: [Chrysler300] FYI After market brake cyl issues

I am not sure that info in link is right, re : when it happened—not 59?? ….our experience is that this change happened in mid 58? On 300D, along with larger control arm bushings , other stuff. Protecting torsion bars from snapping off. Late 58-61 are the same; 57 early 58 the same . I do not know this as hard cold facts , but we have had this issue ;58D can have either size, often you get the wrong ones. Documentation of all this generally a wreck at auto parts stores. This link says 59 was change …??? .or maybe only low production hi perf like 300 got it in 58? . But upgrading to 60 stuff (or 61) with the 60-61 backing plates you get a much better , more evolved setup. 59 MIGHT be same. The big flat spring (easy to put that in wrong, too) is thicker , cams stay put, backing plate spacing front to back therefore thicker . Other issue is that the large diameter 12” 60-61 backing plates described are rare compared to those improved backing plates for dodge plymouth, lower power, or short wheelbase Chryslers. Smaller diameter drums, different width shoes too. Buyer beware ; I bought a whole set up, all wrong. I believe shoes are different too, some have that little depressed area to hook return spring, --I forget the exact issues.

Steering box changes too…/When? Later ones , late 58/59 on up seem to be used for quite a few years after, in many car lines ; anyone know?

I do agree a lot of bad press on total contact brakes has come from well meaning people mixing up all these pieces .

Power brake masters vs non power are another quagmire..the pedal ratios are different, not just the masters,-- master mounts,(that plate)_ firewall drillings and pedal push rod location, vs MC bore height . Parts physically fit that do not work in that area. The firewall differences are really surprising, car body must have been designated power brakes or not from get go, sets pedal ratio. . Which also sets pedal swing arm heights in upper dash and ratios on pedal arm drillings(all this on 1960 Matador—same body as F) ..and adding to confusion there are often two drillings on pedal arm , both wrong for manual brakes. At least two pedal arms. Plus bores of cylinders.

Maybe others more fanatic on the record keeping side can chime in.. Or maybe all this exists somewhere..

Yes ----save all OEM stuff off these cars….

Why getting an unmolested car matters, too.

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of 'David Schwandt' finsruskw@xxxxxxxxxxxxxxx [Chrysler300]
Sent: Monday, March 30, 2015 8:07 AM
To: chrysler300@xxxxxxxxxxxxxxx Club
Subject: [Chrysler300] FYI After market brake cyl issues

FYI

Good thread w/pic’s about Chinese re-pop junk brake cyl’s

Makes me think I should start saving the old OEM cyls for cores.

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=57103&posts=4#M473840