Re: {Chrysler 300} Rear brake drums / hubs ? changed in 60 ?
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Re: {Chrysler 300} Rear brake drums / hubs ? changed in 60 ?



Before 'upgrading' drums, either in width or diameter, make sure you have appropriate wheels/rims that are compatible.  Rims designed to fit properly on 11x2 rims won't fit properly over 12x2-1/2 drums.  There may even be issues just with different widths.

On Sun, Nov 14, 2021 at 7:53 PM Ron Waters <ronbo97@xxxxxxxxxxx> wrote:
One piece hub and drum for both front and rear. Just researched in the 60
parts book. Interesting to note that the drums were different depending on
whether the car was built in Detroit or not. This is true of 11" brakes, but
not 12", which are the same no matter where the car was built.

John, not sure what you are working on, but I would go with the 11 x 2 1/2,
as there is more surface area. 11 x 2s are inadequate. Or better yet, put 12
x 2 1/2 brakes all around and experience superior braking, assuming you are
working on a junior model which was born with 11" brakes.

Ron

-----Original Message-----
From: chrysler-300-club-international@xxxxxxxxxxxxxxxx  On Behalf Of John
Grady
Sent: Sunday, November 14, 2021 1:17 PM
To: chrysler 300 club
Subject: {Chrysler 300} Rear brake drums / hubs ? changed in 60 ?

As we know these drums were factory made by Chrysler in one  piece riveted
with hub (?) and possibly machined that way 57-59 and probably  back to 30's
. . So perfect centering .

As I still have no success on finding 11 x2  Dodge rears  ,( 2.5 are out
there )  - and someone had very poorly modified mine by removing original
drum , adding another loose drum ( later mopar ,?  and new studs ) They used
the stud holes to locate , totally inadequate ,  - as done..  Runs out .060
+ and cut .100 over ( dumb..)! But all that driven by lack of availability ?

So in looking , there are new 60-61 11 x 2 drums around for 60-61 Dodge .
They are loose without taper hub .But as (I think !) I recall 60 dodge used
tapered axles like our 300 do up till 62 . And these new 60  drums fit on
front , too (!) So are 60 mopar  drums serviced separately from the hub (
why different drums listed  in 60-61  vs 59 back? ) Dodge 11x2 59 back with
hub drums are impossible to get , we may face this on our 12" drums very
soon . Still available ( Kantor last year ) but waning supply and very large
$ .
Does anyone know about this ? The 60 dodge drum has a defined toleranced
pilot hole , I assume for centering , but the 58 hub I have does not have
that machining , 1960 must - although  I think I can add that ? Maybe 60
hubs all have it , Or possibly same guy cut the hub face to align new drum
he used in and out?

A drum revision in 60 ? Also in the 60 dodge front and back drums
interchange - a very rational reason to allow hub and drum to separate ??
although the 60 hub has rivet holes  too

Obviously all probably applicable to 300 too , just larger drum ... ??
comments ?
Thank you ,
John




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