Re: [Chrysler300] 300C Rear End?

["Jess Miklas" <jpmiklas@xxxxxxxxxxxxxxxxx>]

Hi Mark

There are 3 different interchangeable 8-3/4" gear carriers...

"741 case" , "742 case" , "489case"

They are all interchangeable, but are different based on the pinion. The 741 
case has a smaller pinion diameter ( 1-3/8") and bearing  than the 742 
(1-3/4") while the 489 has a 1-7/8" tapered pinion and uses the crush collar 
to set pinion depth. The 741 is correct for your car I believe. The 741 is 
sometimes considered  to be "not high performance" due to its smaller pinion 
but it holds up well. (Chrysler went to the 742 case around 1962 or 1963 
because the max-wedge cars were breaking the 741 pinions) For racing you 
would use the 742 or the 489. The posi unit in the 741 and 742 is arguably 
considered to be better than that in the 489.  The 741, 742 posi units are 
clutch units while the 489 is a "cone-spring" unit. The posi units are 
interchangeable in all three cases provided you use the appropriate side 
bearings.

As such, the #'s on the carrier have no relation to the axle housing.

Disclaimer: The above epistle is based on my limited knowledge and I'm sure 
others can expand it.

Jeff Miklas


----- Original Message ----- 
From: "Mark Schueller" <f41324@xxxxxxxxxxxxx>
To: "Chrysler 300 Club" <Chrysler300@xxxxxxxxxxxxxxx>
Sent: Saturday, October 21, 2006 6:08 PM
Subject: [Chrysler300] 300C Rear End?


>
> Greetings All:
>
> The rear axle on my 300C cvt is not stock and I'm wondering what it is. 
> The number on the left side of the carrier (pumpkin) is 2070741 in large 
> numbers.  Below that is the number 807 and to the right of that number is 
> 25 in large numbers.  Can anyone identify the rear axle by these numbers?
>
> The axles are tapered and the hub bolts on to the axle but the drums come 
> off like a '50s era Ford or Chevy.
>
> Thanks for your reply.
>
> Mark Schueller
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> To send a message to this group, send an email to:
> Chrysler300@xxxxxxxxxxxxxxx
>
> For list server instructions, go to 
> http://www.chrysler300club.com/yahoolist/inst.htm
>
> For archives go to http://www.forwardlook.net/300-archive/
> Yahoo! Groups Links
>
>
>
>
>
> 




To send a message to this group, send an email to:
Chrysler300@xxxxxxxxxxxxxxx

For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm

For archives go to http://www.forwardlook.net/300-archive/ 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/Chrysler300/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/Chrysler300/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:Chrysler300-digest@xxxxxxxxxxxxxxx 
    mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    Chrysler300-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/