66 galaxie 289 168 tooth flex plate - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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Old 10-10-2007, 08:21 PM   #1 (permalink)
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66 galaxie 289 168 tooth flex plate

I have a 66 galaxie convertible with a 289 and a 168 tooth flex plate. The flex plate is about 14 1/4 inches in diameter and has the following numbers on the weight C5AE-6375-C-ASSY. My local Ford dealer tells me the new part number is C5AZ-6375-C, but this has not been available for many years.

The transmission has a cast iron center section with aluminum bell and tail housing. I believe this makes the transmission an FMX?

Where can I get a replacement flex plate for this application? I have only been able to find 157 and 164 tooth flex plates.

Can I use a 164 tooth plate and change the starter? What balance would I need?
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[SIZE=3]BTW, my mother bought this car new and sold it to my grand mother in the early 90ís. I got it from my grandmothers estate. I am trying to complete the mechanical restoration in time to give my mom her old car for Christmas. Thanks for any leads.[/SIZE]
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Old 10-10-2007, 08:53 PM   #2 (permalink)
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Re: 66 galaxie 289 168 tooth flex plate

it takes a 157 tooth, 28oz flexplate. Measure your convertor bolt pattern and make sure the new one matches that. Sounds Like an FMX, C-4s usually had a alum housing. FMX ws for the heavy, bigger cars.
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Old 10-11-2007, 09:43 AM   #3 (permalink)
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Re: 66 galaxie 289 168 tooth flex plate

Quote:
Originally Posted by dacofa View Post
it takes a 157 tooth, 28oz flexplate. Measure your convertor bolt pattern and make sure the new one matches that. Sounds Like an FMX, C-4s usually had a alum housing. FMX ws for the heavy, bigger cars.

The 157 tooth flexplate is about 1 inch smaller diameter so the starter will not engage. I laid my 168 tooth plate up to a 164 at the parts store this morning. The diameter appears to be the same but the teeth do not match.

The engine and transmission are original to the car.
[SIZE=3] [/SIZE]
[SIZE=3]The teeth on my flex plate are worn out from 40 years of use. [/SIZE]
[SIZE=3] [/SIZE]
[SIZE=3]Any thoughts on how to solve my 168 tooth problem?[/SIZE]
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Old 10-11-2007, 09:46 AM   #4 (permalink)
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Re: 66 galaxie 289 168 tooth flex plate

Quote:
Originally Posted by dacofa View Post
it takes a 157 tooth, 28oz flexplate. Measure your convertor bolt pattern and make sure the new one matches that. Sounds Like an FMX, C-4s usually had a alum housing. FMX ws for the heavy, bigger cars.

The 157 tooth flexplate is about 1 inch smaller diameter so the starter will not engage. I laid my 168 tooth plate up to a 164 at the parts store this morning. The diameter appears to be the same but the teeth do not match. The engine and transmission are original to the car. The teeth on my flex plate are worn out from 40 years of use. Any thoughts on how to solve my 168 tooth problem?
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Old 10-11-2007, 05:58 PM   #5 (permalink)
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Re: 66 galaxie 289 168 tooth flex plate

Many of the mid 60s 289's "small" flywheels and flexplates had 160 teeth; although you only hear about 157 teeth. The 157 tooth and 160 tooth flywheels are interchangeable. With this in mind, I would assume that the 168 tooth flywheel that you currently have is interchangeable with the 164 tooth ones, particularly since the diameters are the same.
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