Re: Rear Axle Changes

[Jimmy Peavy <peaver63@xxxxxxxxxxxxxx>]

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       A. The 8.75 is plenty strong enough to handle street/strip 
chores. Plus about 100 lbs lighter than the                       Dana 
60, and much easier to change ratios in the 8.75".

       B.  Swapping rear chunks is the biggest consideration. If you 
keep the same ratio in the rear it's not a                    problem, 
but It's a pain in the rear to pull the rear drums, and bleed the brakes 
each  time you want to              swap to a different ratio 3rd member.
            This isn't even adressing the extra work involved to pull 
the flanged type driveshaft.
             I'm not being critical of the design, but only making a 
comparison of the two, in my opinion.
             The things are strong, but there are more steps involved 
in servicing .

       C.   The chunks are the same  from  58 through 74.
              Shims usually have to be made by the owner ( NOS  supply 
has pretty much dried up).
              The axles are easy to find , since the most people swap 
to the flanged type rears.


                Jimmy

Gary H. wrote:

> 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
> >    
>
>
>  


[Non-text portions of this message have been removed]

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