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Old 01-01-2011, 09:18 PM   #1
95SHO
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Default 4.0 Engine difference between 05-09

I am trying to install a 4.0 motor in my 2001 Explorer, but I am running into trouble regarding the felx plate. When did Ford changethe flex plate in the Auto 4.0 Mustangs. I thought everything was the same from 05-10. I read some where that there might have been a design change concerning the strater, flex plate and torque converter in 2008. Any truth to this??
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Old 07-24-2011, 01:33 AM   #2
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This thread may be super old and all, but I'm going to post what I know for the benefit of people searching this topic in the future (I came to this thread via Google search, for instance).

During a swap of a tranny and torque converter from an '05 into my '07 (long story, it was a straight OEM replacement for troubleshooting purposes), I found that the t/c and flexplate designs had changed between those years. The four nuts on the t/c were both a different size ('07 used a 1/2" socket, '05 was a 15mm socket, neither nut fit the other year t/c), and spaced differently (see pics below). As a result, the holes in the flexplate are also spaced differently.

'05 torque converter:
Click the image to open in full size.

'07 torque converter:
Click the image to open in full size.

For clarification purposes, both sets of parts came from '05-'09 4.0L V6 Mustangs with automatic transmissions.
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Old 07-28-2011, 01:12 PM   #3
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As I understand it the 05-06 were the same, and then they changed it for 07-09.
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Old 07-28-2011, 01:12 PM
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