What does the 67 mustang 9 inch rear axle housing look like? I have been told that all of the 67 model year has a fill plug in the back and then others say only for the first couple of months production.
Is it similar to the 68 - 69 with the noticable hump, but just with a fill plug or is it more similar to the 65-66 housing, just a little different in width?
If anyone has a photo I would be greatly appreciative. I have spent a couple hours googling and have not found much info for 1967 housings.
I had a 67 "S" code coupe that had the fill plug on the back.It did have the hump you are refering to as all 9" housings in the 60's Fords have.As was stated Ford did away with the plug after 67 .
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[b][color:"red"]FastE
'73 Mach 1[/color]351C"Q",C6'3L25 White deluxe,folddown,gauges,added factory ram air and magnum 500s.Bought Sep.3'1973
Thanks for the information. The article link posted by v159hill I have seen before. It has good basic information but makes no mention of any differences in 67 housings vs. the 68-70 housings.
I finally found a 67 390 car restoration blog and it had a few photos of the housing. It is a humped housing like the 68-70, but with a fill plug. It is different than the earlier 60's that has the "rounded" appearance and not the definite "hump".
There is alot of incorrect info about the hump on 9" rearends.
I have researched this for the past 3 years. I have asked many original owner's of several different models of original cars. I have been to some of the best car show's. I have photographed every 9" that I could, so that I could try to find answers to some of these same questions. I have come to this conclusion.
The large cars seem to have the more rounded rearend, such as the Full-size Galaxie's.
The mid-size, and smaller size cars seem to have the hump earlier than people believe. I have seen many AFX/BFX, Mid-size cars have the hump as early as 1963 1/2. I have seen the 1963 1/2-1964 large Galaxie THUNDERBOLTS have the rounded rearend. I have also seen the 1964 Mid-size Fairlane THUNDERBOLTS have a Humped 9" rearend. I have also seen an Original 1965 Shelby GT350R with a 9" with the hump. I have seen the hump and rear oil fill cap as early as 1963 1/2 and as late as 1969, I have the pic's somewere.
I know for a fact that the hump appeared far earlier than many people report. Here are some pics from the Detroit Autorama Shows, 2010-2011.
The pic's are as follows, and are of ORIGINAL CARS, NOT CLONES!
Pic 1 & 2 are of a 1966 Ford Failane 500 427.
3 & 4 are of a 1964 Ford Comet Cyclone.
5 & 6 are of a 1964 Ford Fairlane THUNDERBOLT (mid-size)
7 & 8 are of a 1965 Ford Mercury Comet http://i188.photobucket.com/albums/z...s/P2280383.jpg http://i188.photobucket.com/albums/z...s/P2280381.jpg
Another pic.
This is a hard pic to see. I remember this car had a fill hole in back but was hard for the camera to pick it up. It was hard to photograph from the mirror on the floor. I beleive this is the most correct, lowest milage 1970 BOSS 429 known to exist. It has won concourse events. It was one of the last 11 built. The owner was Very kind and cool to let me behind the ropes to crawl under this incredible car. Hope this also helps. DO NOT BELIEVE EVERYTHING. There is alot of bad info that just keeps recycling. It's easy to find bull****, while your searching for facts.
After I wrote this I had an epiphany!
I think that the plug was placed on the back, for cars equiped with large gears such as 3.89, 3.91, 4.11 and up. The ring gear is very thick with these ratio's. I believe that the thicker ring gear would make it very difficult to fill the assembly with oil from the more common pig location. The thicker ring gear would be closer to the inside wall, drivers side, of the differential housing. This would make alot of sence, considering I have found most of these rear plugs on high performance vehicles.
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Joe in Detroit
1969 sports roof, 1966 ranchero
I think the large fill plug was a "67" thing. I've seen a lot of cars, trucks and vans (67 models) that had this fill plug. Ring gear size had nothing to do with it.
I think the large fill plug was a "67" thing. I've seen a lot of cars, trucks and vans (67 models) that had this fill plug. Ring gear size had nothing to do with it.
Nope. I have done years of research on this, see the previous posts and the pics I have of concorse and original 1 owner cars. I have had to do this to verify that I have a real authentic Thunderbolt 9 inch nod.
My quest has unraveled many, many, many, myth's. I thought I would share the info to help others.
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Joe in Detroit
1969 sports roof, 1966 ranchero
I have an original 67 9 inch housing and as I understand it he 67 was the only one that had this style drain plug. The plug is a large hex head type plug you'd expect to find in a hardware store. Mine is going in a 67 Falcon Futura Sports Coupe that was bought new for my grandma of the showroom floor. I use to call her hot rod Ella and my plans are to drag race the car.
__________________ tooponies
"when all is said and done,usually more is said than done".
I have seen the large plug as early as 1963 1/2, through 1970, on Ford high perfomance cars. I have not yet got all my pics together but there is one of an original 1966 Fairlane pic #1 and #2 on my previous post. Scroll Up. This pic is of a car taken at the Detroit Autorama in 2010. MYTH BUSTED. This was not a 67 year only design and you could buy this plug as a performance part at any Ford dealer ship and have it installed. I forgot were I put the info on that though.
Just an F.Y.I.
Im just trying to kill this myth.
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Joe in Detroit
1969 sports roof, 1966 ranchero
Last edited by 1969sag; 02-04-2012 at 02:50 PM.
Reason: typo
The myth is still there without pics or Ford documentation. What you saw on the 66 Fairlane was a 67 design housing on a 66 model car. I'm sure I haven't seen every 9" housing ever built but I've seen quite a few and known only the 67 to have such a plug.
Even if you see one in another car how do you know it's not a 67 housing. Just saying. I know I don't know everything cause my x wife told me so.
__________________ tooponies
"when all is said and done,usually more is said than done".
The 64 Comet in the pic does NOT have an original Ford rear. The Boss Nine rear does NOT have a fill plug in the housing. The large hex-head fill plug may not be a "67 only" thing (though I think it is) but it definitely has nothing to do with being a "performance" vehicle. I've seen lots of trucks, vans, wagons as well as 390 2V Fairlanes and Comets with that style rear housing.
Just checked the pic's again. Scode67b is right. My mistake about the boss 9 pic not having plug. My eyes are getting worse. As for the 64, I believe the owner told me it was the original 9 inch rearend, although I can't take his word as conformation. You can however see that the boss 9 had a flat spot where a plug would have been placed, if the part was ordered. As for the trucks, vans, wagons. Many of these would have thicker ring gears if they had higher gear ratios, especially if they were equiped with the Highway Performance Kit. There was also a Dragway Performance Kit and a Super Stock Kit available. THE ELUSIVE FILL PLUG PART # IS.... 379166-S (PP-54-N) HERE IS A PIC.
I am trying to cross reference this part number to find a date that it became available. If anyone knows please PM me.
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Joe in Detroit
1969 sports roof, 1966 ranchero
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67 9 inch rear axle question
tooponies
part# and pic's
