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By crab - 16 Years Ago
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Anyone happen to know if they are swappable? I have the wrong gears in our bird but have some in a ranchero that are correct ratio.
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By Pete 55Tbird - 16 Years Ago
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The Ford nine inch came with two different axle spline count. Your 57 has 28 splines. There are 28 and 31 spline axles so pull an axle on the Ranchero and count the splines. Pete
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By Hoosier Hurricane - 16 Years Ago
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Crab: Make sure the '69 Ranchero has a 9" and not an 8". They won't interchange.
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By crab - 16 Years Ago
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Looks like a 9 inch, but perhaps they look the same.
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By Hoosier Hurricane - 16 Years Ago
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Crab: They look a lot alike. Easiest way to tell is to see if you can get a socket on the bottom two nuts holding the third member in. If a socket fits, it's 8". If you have to use a box end wrench, it's a 9".
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By Fordy Guy - 16 Years Ago
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I've been watching this post and was just wondering, how many "pumpkins" are there out there? I always thought a 9 inch was a nine inch but this is getting interesting. I bought a carrier that was out of a mid to late 70's Lincoln and someone told me it may be bigger than a 9 inch carrier. how many do you know of? Bud Roberts Winslow AZ
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By pegleg - 16 Years Ago
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Bud, There was also a 9 3/8" Nobody uses them, don't think you can get parts. The original '57 rear end looks like a 9 inch, but it's actually a smaller, 8 1/2 " I believe. You can replace the entire pig in a '57 with a later 9". There a variety of housing styles and several versions of the 9" with bigger and/or smaller carrier bearings, and pinion bearing sizes. They can also be equiped for 28, 31, or 35 spline axles with increasingly larger axle diameters. Then of course there's the Detroit lockers, Ford Traction Locks and a bunch of aftermarket traction control units. Confused yet? The Eight inch has several versions as well, and although you're limited on aftermarket parts for it, it's not a bad choice for a milder engine. They'll stand 300 hp for a long, long time on the street.
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By Fordy Guy - 16 Years Ago
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Thanks for the information on the Ford 9 inch,I am assuming when you say "pig", you are talking about the complete carrier assembly? I'm tossing around the idea of replacing my rearend in my 55 Bird with a 9 inch set-up. That U-joint and yoke on the rearend looks awful tender on the factory set-up. What is the most common swap for 55-57 Birds. I'm running a souped up 292 with a 2.78 toploader and 215-70R-15 BFG's on Cragar s/s wheels and a 11inch diaphram type clutch but am really afraid to pop the clutch for fear of that weak lookin' u-joint may not survive it. Also want to say how nice it is to have a site with so much information and knowledgable people just a few keystrokes away. Thanks for all your info. Bud in Arizona
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By pegleg - 16 Years Ago
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Bud, I can't really tell you which Nine inch would bolt into your 'Bird. If it's a 57 you already have a case (housing) that will accept any later 28 spline Pig. And, yes that's my euphimism for the carrier. You can also have one build or buy parts and do it yourself. The usual place to look is a Mid 70's or 60's pickup, Galaxie or Big block Mustang. Perogie Enterprises has some on ebaty or hit our classified section and see if somebody has one to sell. Moser, Currie, Strange, all sell aftermarket parts, Richmond will sell you about whatever gear ratio you'll want/.
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By crab - 16 Years Ago
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So my 28 spline carrier from the ranchero should fit right in without issues?
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By pegleg - 16 Years Ago
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Only if the 55 has a 57-9 inch housing in it. If it's the O.E. DANA rear end you'll need a different housing. Like I said earlier, there's a lot of guy's here with little birds, including Hoosier Hurricane and AZ28 who've done the swap and will know exactly what you'll need. Have you determined that the Rancho is a nine and not an eight inch carrier?
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By speedpro56 - 16 Years Ago
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The nine inch 57 housing in my 56 crown has a posi 31 spline axle, I took this housing and overdrive t85 out of a 312 equipped 1957 ford 4dr 300 in 1969.I added the limited slip and 31 spline axles several years ago. My 56 tbird has a nine inch 69 housing with a 31 spline trac loc posi.
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By crab - 16 Years Ago
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pegleg (5/2/2009)
Only if the 55 has a 57-9 inch housing in it. If it's the O.E. DANA rear end you'll need a different housing. Like I said earlier, there's a lot of guy's here with little birds, including Hoosier Hurricane and AZ28 who've done the swap and will know exactly what you'll need. Have you determined that the Rancho is a nine and not an eight inch carrier? Looking at both, the front bearing housing would be in the way to get a socket on either one.
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By Hoosier Hurricane - 16 Years Ago
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Crab: It is not the pinion bearing housing that you need to try to get a socket on, that is doable on both sizes. The nuts that hold the carrier in the axle housing are the ones I was referring to. If you can get a socket on all the nuts, it's an 8 inch. If you cannot get a socket on the bottom two, and have to use an end wrench to take them off, it's a 9 inch.
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By crab - 16 Years Ago
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Hoosier Hurricane (5/3/2009)
Crab: It is not the pinion bearing housing that you need to try to get a socket on, that is doable on both sizes. The nuts that hold the carrier in the axle housing are the ones I was referring to. If you can get a socket on all the nuts, it's an 8 inch. If you cannot get a socket on the bottom two, and have to use an end wrench to take them off, it's a 9 inch. I know what your talking about, just looking under the car a socket looks like it wont work on either without hitting the housing, the bearing housing is huge.
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By Ted - 16 Years Ago
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crab (5/2/2009)
So my 28 spline carrier from the ranchero should fit right in without issues?Assuming you’ve verified the ’69 unit is a 9” and not an 8”, the later model 9” center section (carrier, pig, pumpkin, dropout) for 28 spline axles will fit into the ’57 housing without issue with the following exceptions. You’ll need to verify that the yoke length as well as the u-joints are the same dimensions as these do tend to vary depending upon application. The yokes are interchangable but a new pinion bearing crush sleeve must be installed each time the pinion nut is loosened. Fordy Guy (5/2/2009)
I bought a carrier that was out of a mid to late 70's Lincoln and someone told me it may be bigger than a 9 inch carrier. how many do you know of?
Some of the Lincolns, Mercurys and Ford station wagons came with a 9 3/8” ring gear and I’ve only seen 31 spline axles associated with these. These particular pumpkins will swap into a conventional 9” housing if a pair of notches are cut into the 9” housing to allow the larger ring gear to slip in. By the same token, I’ve used the 9 3/8” rear housings for swaps which will take any 9” center section without modification.
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By Doug T - 16 Years Ago
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9" rears may have even more combinations that Y blocks. Another difference not yet mentioned is that there are 2 sizes of main bearings for the ring gear. Then there are a lot of different yokes that fit the pinion. The '55 U joints probably wont fit the later model yoke. You will probably need the kind of U joint that has the two u bolts. The '55 has 4 capscrews I believe. I would suggest that you take the yoke you intend to use and '55 drive shaft with you when you buy the new U joint to be sure it will all go together. BTW I have a '57 T bird 9" in my '55 and it has taken several different pumpkins over the years. I use the '57 yoke but I had a new drive shaft made to match the trany setup I have so I can not tell you if you stock drive shaft will work. For more info on what goes together the pumpkin, gears, bearings, crush sleeves, splines, nodular iron and aluminum housings, lockers, traction locks etc etc., check the Curry axle web site. As I remember there is a lot of useful info on there. I believe that they also say that the '57 & 58 axles are about the weakest but probably good enough for most Y blocks
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By Hoosier Hurricane - 16 Years Ago
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Crab has received a lot of information, but a lot of it he doesn't need. The heading of his thread states "57 Bird rear carrier", and his real question was about swapping in the '69 carrier. The '55-'56 Bird info, though good, does not apply to his question.
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By Noob - 15 Years Ago
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T-5 swap done (in place) and about to modify drive shaft, but now evaluating the rear end and I'm confused as to what I have and my options on the pinion yoke... preferring 1330/1350. One wheel turns freely while opposite wheel didnt move... open, non-LSD, right? Can get socket on both lower carrier bolts... non-9", right? How do I determine if the housing is big-enough for a 9" third member? (I thought `57 Tbirds came with 9" housing regardless of third member) My interest is in LSD (disc type), so if housing is 8" only, what application/vehicles may have had 8" posi? And lastly, what the heck is an 8.8" rear end... is that where the back of the housing has the removable cover? Confused noob trying to think ahead... Brian
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