Re: {Chrysler 300} 1958 300 Upper Control Arm Bushings
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Re: {Chrysler 300} 1958 300 Upper Control Arm Bushings



on this a few cautions  , 58 model year can have 57 bushings or for that  matter entire 57 front end setup  OR “ late 58” , and thus the 59 /60 + type . 
Others may contest this from parts books but it is for sure true . After much confusion I got into replacing original ball joints etc on D ,trying to resolve it —-  I finally found a moog parts counter catalog from the period . it had an asterisk on 58 300 , “check with “moog” , and / or two ball joint numbers . 
First documented stuff I ever saw on this . 

The D upgrade is truly significant included better brake setup with the thick backplates and thus different wheel cylinders to fit thicker bigger backplate parts  . Similar , 59 Desoto rust free lwb frame I had used on a C had the larger parts .( so went that way on C)  I believe ( someone step in ) you can ID by shim  type early front end adjustments vs cam bolt? comments welcome but I had this problem . lots of wrong D parts . so two joint numbers ,—  each in two sizes . see below . I think the bore of upper CA bushings changed size for the larger cam  bolt too . related , people use oil “ to help “ press in . Never ever do that,  it destroys the rubber . supposed  to be dry but as it can be hard , silicone grease helps rubber . the torsional aspect of rubber matters apparently , i read other warnings to do final tightening of through bolt with suspension loaded , not wheels hanging . 

second , the moog joints are/ were  always replacements in the day and so the thread is lightly oversize to cut new threads over or  on top of the old cut ones , requiring high torque ( they had a marketing name for this feature) .
However this is NOT clear on box If — as happened to me , — you have a new control arm —- superman could not get those oversize joints into a new arm 
Other way around you get an OEM factory  part ( for a new control arm ) it falls into an old cut  thread, too loose ? ball joint can unscrew itself ? but still captive in bottom arm  given load direction 
Been there too. After much worrying and grinding  of teeth , i did a calc on psi of JB iron filled epoxy and used the looser OEM one in a used control arm . Not saying to do that ever , to others , but i was happy with it for myself been ok 6-7 years .It was  not “ loose” just not tight enough to reach the torque they tell you you need while cutting thread . apply epoxy liberally and drive home . Cannot unscrew imho 

I am not sure about timing of steering  box changes too that happened around that  time   leaving huge “ coaxial “ box behind around 58  
Just info for people who may encounter all this for the first  time .( not mentioned in this post ) 
John g 
Sent from my iPhone

On Jan 16, 2024, at 1:06 PM, micke.sundbom <micke.sundbom@xxxxxxxxx> wrote:


 Larry i use Joints & bushings from FCRC machine as is reseller for brand Rare Parts,  new and correct part. Same with ball joints, you have to look close to have the correct one. Threads must have the same location as the original....lots for sale are not correct.
/Michael




Skickat från min Galaxy


-------- Originalmeddelande --------
Från: "larry.pwb via Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Datum: 2024-01-16 18:22 (GMT+01:00)
Till: 'Chrysler300' <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Ämne: {Chrysler 300} 1958 300 Upper Control Arm Bushings

Does anybody sell new Control Arm Bushings for a 1958 300

Looks like the ones for sale on-line are older replacement parts

My concern is the rubber on these unused older bushings is probably deteriorating

 

 

Larry

.

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