{Chrysler 300} RE: Re[2]: [Chrysler300] 64 K Rear Diff

Interesting and educational string, eh wot?

From 1964 Parts Catalog, Page 3-11

3-32-1 DRIVE SHAFT

Application	Part No.	Length	Pinion OD
Plymouth, Dodge & Chrysler	*1829266	31 ½	1.375
Imperial	1829267
High-Po. 426 Ply. & Dodge-w/Sure Grip	*2404050	30 7/16	1.750

*: Indicates change or addition.

Rich B. (Welcoming the gentle rain-first time in months in the Bay Area)

From: Bob Merritt <bob@xxxxxxxxxxxxx>
Sent: Friday, December 11, 2020 3:07 AM
To: c300@xxxxxxx
Subject: Re[2]: [Chrysler300] 64 K Rear Diff

Hey Mr B.

Are you sure about the axle lengths?

I am 90% positive that Sure Grip versus open

differential axles are different in length.

Bob

------ Original Message ------

From: "'Rich Barber' c300@xxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx>

To: "'Rick King'" <rickking952@xxxxxxxxx>; chrysler300@xxxxxxxxxxxxxxx

Sent: 12/10/2020 3:16:37 PM

Subject: RE: [Chrysler300] 64 K Rear Diff

Rick:

The 1964 “Service Technical Manual” shows the 2.76:1 differential was standard in Newport’s and New Yorkers so should be easy to source. I believe the pinion shaft and U-joints in Newport’s were of smaller diameter than those in NY’s.so you might take that into consideration for strength and boltup to your K’s rear U-joint. Your speedometer pinion would need to be changed from 19-tooth dark blue to 16-tooth brown. Axle lengths are same for conventional or Sure-Grip. You are probably aware that the rear brake drums on our ‘64’s are hard to remove. Special tooling and techniques may be required. Ask if you need guidance.

Do let us know how much greater MPG you get after the change and whether top-end speed was increased or decreased.

Rich Barber
In sunny CA, surrounded by Covid 19 cases and Governor’s lockdown. So far, so good.

From: Chrysler300@xxxxxxxxxxxxxxxx <Chrysler300@xxxxxxxxxxxxxxx> On Behalf Of Rick King rickking952@xxxxxxxxx [Chrysler300]
Sent: Thursday, December 10, 2020 10:38 AM
To: chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] 64 K Rear Diff

Hi everyone, I am looking for a rear diff. & axle shafts for my 64 300 K. Would like a gear ratio around 2:76 . Also need a Posi unit as well.

Thanks, Rick King
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Posted by: "Rich Barber" <c300@xxxxxxx>
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