RE: mopar posi

No my '64 Polora does not have the original rear end housing, it has a '65 that came from a '65 parts car I had for a while years ago. I also have a '66 Coronet rear end I am preparing to prep up .The Polora's original rear end was donated to the station wagon that I am converting back to 3-speed, back when my son was using it for his project car when he was in high school, shortly after he installed the freshly rebuilt hopped up 383 engine and a competition clutch. After a couple of passes down the track during the high school drags, the station wagon's original rear end started making disturbing noises. During an afternoon of playing musical rear ends between the three cars, the station wagons original rear end was installed in the '65 Coronet parts car. The guy we sold the '65 to wanted the body for a race car, he did not care.
I am going to leave the Polora's original rear end on the station wagon.

Which brings up another question I have regarding the axles, I do not where to look something like this up. Does it make a difference on what axles were used per application, or were they all the same?
The '65 Coronet rear end was from a 3-speed manual /6 application (the engine and trans was long gone when I acquired that '65 Coronet parts car).
The '66 Coronet rear end was from a 383 automatic application.

Ben Morgan

So what if I have cars in my yard

1966 Dodge Coronet 500
1964 Dodge Polara 2-dr HT
1964 Dodge 330 Station Wagon
1954 Ford F-100 (Grandpa's Truck)
1990 Ford Bronco 5.8L
plus a few other wrecks and lawn ornaments

Date: Sun, 3 Mar 2013 14:46:38 -0800
From: raybell46@xxxxxxxxx
To: 1962to1965mopars@xxxxxxxxxxxxxxxx
Subject: Re: mopar posi

I think it's a 489 and the '9' is hard to see...

On Monday, 4 March 2013 03:38:30 UTC+10, MO wrote:

I don't recognize that casting number.....

HERE WE GO AGAIN!

There ARE differences between different models, you need to know this. I think the '64 models still had different axle lengths for open vs Sure Grip (nobody put that in, did they?) centres. At some point, either '63 or '64 this was changed and someone with more knowledge than me would have to confirm.

This all assumes you have the original rear end in the car, of course. Which would have the tapered axles with the big nut on the end to retain the hubs. The centre block in the earlier open differentials was a quarter of an inch smaller than the later models (they are 1.5", so the earlier one is 1.25"), while the Sure Grips had the full 1.5" spacer 'buttons' in there. So the axles are an eighth of an inch LONGER for open centres.

This particular Sure Grip is the later cone type made by Borg Warner, by the way. It is not as highly sought after as the Dana Power Lok as used up until the end of the sixties and therefore should sell for less. That said, it seems the prices on these things are steadily climbing and I'm sure the cone type will do the job in most applications. And don't believe they aren't rebuildable, as they can be re-machined and the springs packed with spacers to rejuvinate them.

So check what your present rear end is...

Ray

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