I’m pretty sure all 6V Ford and Chrysler products were positive ground and that all GM 6V cars & light trucks were negative ground (except, as I read it, certain GMC PU’s that were positive ground—go figure). Chrysler and Ford switched to 12V Negative ground in 1956.
When I got my ’55 C-300, the battery was installed backwards and set up for negative ground. Seemed to work OK but the Ammeter was a$$ backwards. When I discovered it, I just reversed the battery and all was well—except the radio which never worked and may have been smoked by the polarity error. Power seat motors may have been operating in reverse—can’t remember. Starter worked fine.
Rich B.
Brentwood, CA.
From: Chrysler300@xxxxxxxxxxxxxxx <Chrysler300@xxxxxxxxxxxxxxx> On Behalf Of John Grady jkg@xxxxxxxxxxxxxxxxx [Chrysler300]
Sent: Saturday, October 3, 2020 2:14 PM
To: Cox <Scooter465@xxxxxxx>
Cc: chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] Ground polarity
Most 6 v , not just Chrysler were + ground . Plus or - had no real advantage at first . So probably 55 300.. Was + ground ( 6v)
12 v tubes ( that will run without vibrators to step up volts ) came on scene contemporary with 12v cars ; radio design with those new tubes ( about 54) required generally that anodes of tubes are + , so the normally grounded tube cathodes are -. There was a real reason to go - ground then.
However transistors used in output were temperature fussy PNP germanium , and required the opposite , why the mica washers and sort of inverted design of output stage of those hybrid radios common in our 12v cars . Later NPN silicon transistors run the same polarity as tubes, all is happy .
If you do jump a car backwards generally your radio is toast , transistors will blow and Electrolytic capacitors fry . Before fuse blows..
Sent from my iPhone not by choice
On 3 Oct 2020, at 4:11 pm, Cox Scooter465@xxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
What year Chrysler products
Had positive ground?
Never heard of that before.
Bob Haag
On Oct 3, 2020, at 3:57 PM, 'Rich Barber' c300@xxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
As a teen working in a full-service station in the ‘50’s, I quickly learned that MoPar meant positive ground and LH threads on the driver’s side. Nothing like a tongue lashing by the experienced mechanic as I tried to change a tire on the driver’s side of a Chrysler or the big flash when the jumper cables were attached incorrectly. I’m sure there were competing theories that differentiated the products of the big three but I recall an early belief that the problem was more organizational stubbornness than technical veracity. Still a lot of that going around as we remain very human.
Rich B.
Smoky and hot Brentwood, CA—but can’t complain as many have it worse. Human, livestock, pet and wildlife lives continue to be lost as well as massive property damage in the CA fires.. I did see a picture of a burnt-up ’39 Ford in the news and assume other collector cars were lost. Hoping the insurance companies treat their customers fairly. Hot temperatures and high winds predicted for today.
From: Chrysler300@xxxxxxxxxxxxxxx <Chrysler300@xxxxxxxxxxxxxxx> On Behalf Of Ronald Klinczar rjklinczar@xxxxxxxxx [Chrysler300]
Sent: Friday, October 2, 2020 10:13 AM
To: David Schwandt <finsruskw@xxxxxxxxxxxxxxx>
Cc: Michael Sundbom <micke.sundbom@xxxxxxxxx>; Chrysler 300 List <chrysler300@xxxxxxxxxxxxxxx>
Subject: Re: [Chrysler300] Wheel Studs knurl & length size wanted.
Don't tell me you never turned them the wrong way. :)
On Thu, Oct 1, 2020, 2:57 AM <finsruskw@xxxxxxxxxxxxxxx> wrote:
> Nasty!!??
>
>
>
> *From:* Chrysler300@xxxxxxxxxxxxxxx <Chrysler300@xxxxxxxxxxxxxxx> *On
> Behalf Of *Ronald Klinczar rjklinczar@xxxxxxxxx [Chrysler300]
> *Sent:* Wednesday, September 30, 2020 10:01 PM
> *To:* Michael Sundbom <micke.sundbom@xxxxxxxxx>
> *Cc:* Chrysler300@xxxxxxxxxxxxxxx
> *Subject:* Re: [Chrysler300] Wheel Studs knurl & length size wanted.
>
>
>
>
>
>
> Michael,
>
>
>
> Right in my hometown is McGard at 3875 California Road in Orchard Park,
> New York. They make every wheel stud imaginable, and helped me get the
> right studs for my 300, including eliminating nasty reverse thread studs.
>
>
>
> Ron Klinczar
>
> '65 300 in Ice Blue
>
> Orchard Park, NY
>
>
>
> On Wed, Sep 30, 2020, 2:31 AM Michael Sundbom micke.sundbom@xxxxxxxxx
> [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
>
>
>
> Hello, when I intend to order a set of new brake drums front & rear 57
> 300c from Kanter, I wonder if anyone can guide me to the right wheel studs
> front & rear with correct knurl and length size before ordering?
>
> Part no and where to order never hurts either .. yes it goes fine with
> 100% original fit with right and left thread. Anyone sitting on info?
>
> Never asking never learning...input welcome.
>
> /Michael
>
>
>
>
>
>
>
>
[Non-text portions of this message have been removed]
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