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| Flair Birds [1964-1966] You have a Fourth Generation Bird or just have some questions about them? Then this forum is for you, check it out. |
This is a discussion on Differential replacement within the Flair Birds [1964-1966] forums, part of the Thunderbird Model Years category; My '65 convert differential has a clacking sound on deceleration. It's days might be numbered. Any ideas? Has anyone replaced/updated ...
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09-25-2009, 12:00 AM
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Differential replacement
My '65 convert differential has a clacking sound on deceleration. It's days might be numbered. Any ideas?
Has anyone replaced/updated a rear end with a disk brake differential from a Mustang or Crown Vic? 
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10-04-2009, 09:10 PM
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Do you want to replace the center section or the rear end -Backing plate to backing plate?
You can pull the center section by removing the driveshaft and the rear axles, then the nots holding it in place.
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10-04-2009, 10:03 PM
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Harley,
Thanks for tip. I'm thinking about replacing the entire rear axle so that it doesn't make noise and I have disk brakes in the rear. Have you tried doing this?
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10-28-2009, 02:08 AM
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I have a good 66 axle that is in good condition off a 66 q code I am parting out.
email me at [email protected] thanks!! DV
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10-28-2009, 01:36 PM
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Differential
The Thunderbirds with the 428 engine (Q cars) used a 9-3/8 " rear end. The 390 cars, such as the 1965 used a 9". They also had different number of splines on the axles.
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10-28-2009, 08:11 PM
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Yes you could be right.. I need to check that on this car.
I do know that the housings are the same. and the axle shafts are same all 31 spline large. I used a 69 t-bird axle that originally had a 9 3/8 put in a 9 inch 4.56 locker and bolted it into a 67u galaxie thanks!! D
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