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Old 11-24-2013, 04:15 PM
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67 lincoln 9 3/8 inch differential questions

so awhile ago i pulled out a what i thought was a 9in out of a 67 lincoln. turns out it was a 9 1/2 in rear end. so far what i know for a fact is, the housing fits a 9in pumpkin just fine, same bolt patter and size. (only difference in the housing is the small notch cut to fit the 1/2 in bigger gear) what i need to know is if the pumpkin can fit 9in parts? like a detroit locker for a 9in and normal 9in gear etc. i want all the info i can get about this seemingly non existant rear end...

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Old 11-24-2013, 04:47 PM
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It's actually a 9 3/8 rear end, not 9 1/2. They were used in the late '60s and early '70s, mostly in Lincoln and Mercury, but also in Thunderbirds. I've got 3 of them and I've tossed several in the scrap metal. The housing is the same as the 9 inch other than that notch that you mentioned. That and the axles are the only parts that interchange with the 9 inch. I've got a 9 3/8 with a Traction Lock differential which is probably pretty rare. There are no good gear ratios available for this rear end. I think I might have a 3.00, but most that I have seen were about 2.75s.
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Old 11-24-2013, 05:56 PM
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thats exactly what i needed to know. i was hopeing the pumpkins could interchange but oh well. i got the housing. other wise i need all the rest. thank you again sir... i wish it was common practice to narrow axles cause these are beefy but again, oh well
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Old 11-24-2013, 06:07 PM
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Send the axles to Moser and they will cut and respline them for you.
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Old 11-24-2013, 06:52 PM
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I ran into the same thing,bought what I thought was a 9" and welded my 4 link brackets to it and mounted it before I realized what I had. A friend told me to junk the center section and use a 9" I installed one with a locker and the axles and everything else seemed to fit fine.
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Old 11-24-2013, 07:11 PM
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Maybe I confused you. I didn't mean that the 9 inch chunk would not fit in the 9 3/8 housing. It will. The 9 3/8 chunk will also fit in a 9 inch housing if you cut the notch for the gear to clear. I did that on the first 9 inch that I had in my Camaro so that I could use the 2.75 9 3/8 chunk that I have.
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Old 11-24-2013, 07:41 PM
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Fit ?

I have never tried to fit a 9 3/8 into the early housings, 1957 style and 65 hipo mustang 9 are smaller than the later years . also the 9 3/8 ones I have , had were 5 on 5 wheel pattern.
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Old 11-24-2013, 09:09 PM
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I put a 9 3/8 chunk in a '64 Galaxy housing, which is the same size as the '57 and Mustang housing. It will fit if you cut the notch to clear the gear.
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