TC, flex plate, or transmission? - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 09-21-2019, 04:31 AM Thread Starter
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TC, flex plate, or transmission?

This is on my 97, put it in here for more traffic....move it if you want mods.

Started out with a grinding noise only in P R D 2 or 1. No noise in neutral.

Now I've got a horribly loud grinding noise in all gears, so loud that I am thinking it is eternal to the transmission or torque converter. So I am thinking flex plate?

The truck drives and shifts fine, although I'm not driving it anymore until I figure out what that noise is.

If I pull the inspection cover will I be able to see most of the flex plate while rotating the engine by hand?
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post #2 of 9 Old 09-21-2019, 06:16 AM Thread Starter
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video from this morning with inspection cover removed

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post #3 of 9 Old 09-21-2019, 08:24 AM
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Maybe itís just the video quality, but the flexplate looks like itís wobbling to me. Try and look straight up near where the bolts are and see if itís broken. Thatís where they usually fail


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post #4 of 9 Old 09-21-2019, 12:00 PM Thread Starter
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Originally Posted by 7.3_TurboDiesel View Post
Maybe itís just the video quality, but the flexplate looks like itís wobbling to me. Try and look straight up near where the bolts are and see if itís broken. Thatís where they usually fail


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There is a collar or spacer between the block and the flex plate that is hiding the bolts. I turned the flex plate by hand and there are no cracks extending to where I can see.
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post #5 of 9 Old 09-21-2019, 02:30 PM Thread Starter
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I pulled the truck into the garage, as soon as I gave it any pedal the noise went away. Almost certain it's going to be the flex plate.
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post #6 of 9 Old 09-22-2019, 05:38 AM Thread Starter
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cracked all the way around....going to replace with OEM ford if the part is still available.
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post #7 of 9 Old 09-22-2019, 08:02 AM
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Interesting, thanks for sharing. Iíve only had one personal experience with a cracked flex plate, and it sounded like a rod knock.
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post #8 of 9 Old 09-22-2019, 03:06 PM Thread Starter
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Interesting, thanks for sharing. Iíve only had one personal experience with a cracked flex plate, and it sounded like a rod knock.
Same here...sounded like the engine was going to blow until I gave it a little pedal....then quite.
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post #9 of 9 Old 09-23-2019, 05:47 PM
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I've had good luck with TCI flex plates. They have one for towing that's far superior to stock.
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