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Old 08-25-2002, 11:40 AM
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Post I am baffled!!!

1966 Mustang Coupe - oringinally an inline 6 with a standard. I just bought it as-is with a 302 (1968 Galaxie) and I think a C4. Yesterday I was checking out the rear brake lines and I was shocked when I saw the rear end. It has a rear cover - sort of diamond shaped - with 8 bolts - 4 on top/ 4 on bottom. The driveshaft has obviosly been cut/welded and the pinion side of the rear sticks out pretty far. I've looked everywhere online and I have no idea what this is! The axle tubes narrow like an 8" if that helps.

The Vandal

Also, I have casting numbers from all over the place - is that normal Ford? i.e. 1968 alternator housing w/ 1969 pulley. 1968 Galaxie intake/ 1966 timing chain cover/ 1968 Thunderbird radiator fan, etc.

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Old 08-25-2002, 01:31 PM
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Wow that's a strange one. I checked both my mustang manuals and even back to 64 1/2 it shows either the 8 or 9 inch rears with removable third members. Then I thought maybe someone put a newer 8.8 in her but even those I believe have 10 bolts in the cover not 8. Now I'm curious too. <img src="confused.gif" border="0">
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Old 08-25-2002, 08:03 PM
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That is most likely the 7 1/4" RG Integral Carrier used on six cylinder applications. You might want to consider finding at least an 8" assembly. That one is not up to hi-torque applications.

You will find a hodge-podge of engineering numbers on most any application as what is stamped for any one application is most likely also used on another.
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Old 08-26-2002, 05:45 AM
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Thanks KULTULZ, I was following this waiting for an answer. Were those rears used for a lot of years? Did they come in the mustang or do you think someone put it in there. Sorry about all the questions but I'm curious 'cause my old beat up Haynes manual only showed the 8 and 9 inch rears. I quess from what you said it must not have been a very strong rear, is that why they stopped making it?
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Old 08-26-2002, 07:40 AM
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What you're looking at is a Dana unit. Ford used them in light duty applications. They can be found under pintos and mustangII as well. Good enough for their intended use but crap for anything else.
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Old 08-26-2002, 04:26 PM
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My brother got tricked...

He has an '83 Capri 3.8L and wanted to upgrade the rear to an 8.8. They (salvage yard) sent him one of these things (used on early FOX bodies also) and it took me to drive to WV to let him know he had been had.

What a maroon...
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Old 08-27-2002, 03:08 AM
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Thanks guys. I assume this isn't a Ford unit as I found a tag attatched with one of the cover bolts and it doesn't have anything like a Ford number on it. Not that it really matters now but which Dana unit? I looked at all of them and none had 8 bolt covers. The tag:

WCY - E
3.20 5HA 902

Does that mean anything to anyone (besides the 3.20)? Thanks again - you guys are great.

The Vandal
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Old 08-27-2002, 03:33 AM
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It is a FORD assembly part.

WCY-E denotes 64/ Falcon (Mustang and Falcon were assembled on the same lines)

5HA is the date code and;

902 is the plant code.

What you have is a very common rear.

Whoever did the changeover just did not upgrade the rear.
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Old 08-27-2002, 07:27 PM
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[quote]Originally posted by dmorris1200:


Thanks KULTULZ, I was following this waiting for an answer.
  • Were those rears used for a lot of years?
  • Did they come in the mustang or do you think someone put it in there.

Sorry about all the questions but I'm curious 'cause my old beat up Haynes manual only showed the 8 and 9 inch rears. I quess from what you said it must not have been a very strong rear, is that why they stopped making it?<hr></blockquote>

Sorry I didn't get back to you. The rear assembly was used from 1960 (Falcon) until the first years of the FOX body. It was cheap and all that was needed with 4 & 6 cyl power. As previousy stated, it was also used in the Pinto/Mustang II series in the seventies. It will not take a large amount of abuse. It was replaced with the 7.5 rear.

You need to chuck that HAYNES and start collecting FORD service manuals.

I have a 1973 set that details this rear assembly.

You a FORD nut too?
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Old 08-28-2002, 03:45 AM
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Yea sometimes I feel these Haynes manuals leave a lot to be desired. Unfortunately all I have. You wouldn't happen to have a Ford manual for my 73 stang would ya? If I could afford it I might be interested. And yes, have owned a couple old cougars, torinos, mustangs, galaxies, and even a hopped up mustangII in there. Always liked the body lines on the older fords. Thanks for responding.
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Old 08-28-2002, 04:22 AM
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[quote]You wouldn't happen to have a Ford manual for my 73 stang would ya?<hr></blockquote>

Yes, I have the six volume set, but they are not for sale. You can usually find these on e-bay or it might be possible that it is still in print from Helms, Inc.

The amount of information is endless...You would most likely throw stones at the Haynes.
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Old 08-28-2002, 11:31 AM
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Thanks for the tip. I may try e-bay, tried Helms but no luck. Just wonder what my chance are of finding manuals that old without spending a fortune.
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Old 08-28-2002, 12:13 PM
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gee, wouldnt you like to know what to do now? let me suggest the obvious: find a ford 9 inch
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Old 08-28-2002, 03:54 PM
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[quote]Originally posted by dmorris1200:


Thanks for the tip. I may try e-bay, tried Helms but no luck. Just wonder what my chance are of finding manuals that old without spending a fortune.<hr></blockquote>

I think you will be presently surprised. I just purchased a 1958 MERCURY shop manual from a used book dealer in WA state. 75.00 I think it was. There are also reprints available.

But once you use one, you will try to figure out how you got along without it.

May your journey start -here-
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Old 08-29-2002, 02:59 PM
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Thanks again KULTULZ.
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