RE: Rear Axle Changes
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RE: Rear Axle Changes



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The 8-3/4 center chunks are interchangeble right up thru 72 I believe except pre-64 units with wider thrust-blocks, were 1/8-1/4" wider than later models, used different axle shafts. 59-63 had wider blocks, 64-70 narrow blocks. All captured in a tech article on the Autohobby Digest website,

http://www.autohobbydigest.com/8_75.html


From: "Gary H." <62to65mopar@xxxxxxxxxxx>
Reply-To: 1962to1965mopars@xxxxxxxxxx
To: 1962to1965mopars@xxxxxxxxxx
Subject: RE: Rear Axle Changes
Date: Fri, 21 May 2004 14:20:11 +0000

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My 2 cents:

A. The 8.75 was strong enough for the racers of the day back in the
1960's. Granted, the tire technology was less "sticky" then, but if you
are using the car as a street machine unlikely you'll have such a
HP/tire combo to pull the front end up in the air and snap the 8.75.

I *think* Don D's 1963 Dodge 440 with a 426 uses a tapered version of
the 741 8.75 and 391 gears with 29 inch tall tires without problem.

B. Drum pulling is the biggest complaint I hear about these. But
swapping axles is less time consuming on the '65 up versions. How often
do you swap axles, though?

C. Don't the center chunks fit regardless of years? I always forget this
point. As for availability of shim spacers, bearings, axles on the
tapered I don't know. I assume used tapered axles are easy to find,
should your Mopar snap one.

Gary H.

Robert neal zimmerman wrote:
>
> > Depends on your goal with the car, I suppose. Stop or go?
> > > > > Or use the existing 8.75, as it is strong enough for a lot of typical
> > applications.
> >
> > Gary H.
> OK help me out, i am kind of on this thing right now too.
> A) is the early 8 3/4 rear just as strong as the later one?
> B) Is it this drum pulling that makes them tricky or are there other
> drawbacks?
> C) are the early rearends harder to find parts for or do they
> interchange just fine?
> Neal Zimmerman, Eugene Oregon


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----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.


b7yoMz. 







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