[Chrysler300] brake lining material choices

["Ulf Larsson" <ulf.larsson@xxxxxxxxxxxx>]

Hi group,
 
A comment to the subject;  Around here several people got in the same kind of trouble with their Chrysler oldies (55-62) when changing the brake linings,  due to wear , and in combination with having the drums re-sized accordingly.  The brakes stuck,  and hopefully one can go reverse in order to get them to release again.  Worse if the grip is bad, like on a gravel area, and the car can remain with the brakes dragging.  We haven´t found the true reasons behind here but several faced the same thing.  Would like to add in the following that it seems like the problem is not when the cars/brakes are cold. After breaking a few times the problem can happen.   The cure?   So far what happened was that no one specified what lining type to use when leaving parts at the brake shop so we assume they put on modern regular stuff and often it won´t work properly.  The cure used several now and successfully is to find some old asbestos lining and change the brake material again and problem gets less/ disappear.  Asbestos is no longer in use so to enable this cure you´ll have to find some old stock and use although actually not allowed.
 
We have discussed several possible reasons for the problems that occur (unless going for old asbestos lining), like the possibility that the turning of the drums is made inappropriate compared to the arc of the linings, (although work is made in more than one brake specialist shop with the very same out come),  possibly the NORS brake cylinders are not Ok for use universally for all years although claim to be (without putting shims inbetween to compensate for various thicknesses of the drum backing plates used),  possibly use of NORS/or NOS brake lines in combination with modern brake fluid,  possibly the way we go about adjustments,  possibly the pin inbetween the pedal and the master cylinder adjustment,   etc, etc.   No true reason found yet but the conclusion that old asbestos type linings will work and cure the problem.
 
This is not about to having the drums pulling left or right thing, but that brakes get stucked, after stopping they are stucked. Go in reverse and they come free again if you have the friction enough towards the surface to pull them backwards to unstuck.
 
Our solution so far,  go old rather than go modern.  So here was some more gas onto the fire.  Pls comment,  where do we go wrong here?   Sad thing is that besides going for old asbestos lining (as long as we can still source them) people also tend to change for disc brakes in front to avoid the problem.  It´s all fine by me, with both AAJ and SSB kits you can modify back again if you like, without any trouble, but, and embarrassed to admit it (nhha, it was a great car also)),  I used to have a GM,  Buick Electra conv from -68.  A big car with a heavy 430" in the front,  all drum brakes, even the type with alu/steel insert combo and the car stopped beautifully.  No problem what so ever, not from speed, not in slow, never stuck, never pulling left or right, just perfect, very efficient also for modern traffic driving,  so,  did they learn all that much in brake design in just about 10 years (57- 68)?  Normally and in most aspects a Chrysler would be all superior to a GM but with brakes,, or is it just we that have lost the knowledge about how to go about properly?
 
 
Best regards
Ulf, Sweden
     
 


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