Pic of my broken flex plate that i thought was rod knock.
04-10-2011, 01:41 PM
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Pic of my broken flex plate that i thought was rod knock.
So after figuring I had rod knock, even a friend agreed it sounded like rod knock, I pulled my oil pan and replaced all the rod bearings even though they all looked ok, just normal wear. The knock was still there.
I noticed that the sound seemed to come from the bottom of the motor towards the back, so it seemed like rod 5 or 6 was knocking. But after this didn't fix it, I noticed that the noise might have been coming from bellhousing, but was hard to pinpoint. Another friend who used to be a mechanic said that he had seen flex plates crack and that may cause some strange noise. I pulled the little inspection plate off and noticed a loose bolt, but couldn't see any cracks, until I pulled the tranny off yesterday and what do I see?
Replaced with salvage yard $50 plate, BAM noise gone....
I noticed that the sound seemed to come from the bottom of the motor towards the back, so it seemed like rod 5 or 6 was knocking. But after this didn't fix it, I noticed that the noise might have been coming from bellhousing, but was hard to pinpoint. Another friend who used to be a mechanic said that he had seen flex plates crack and that may cause some strange noise. I pulled the little inspection plate off and noticed a loose bolt, but couldn't see any cracks, until I pulled the tranny off yesterday and what do I see?
Replaced with salvage yard $50 plate, BAM noise gone....
04-11-2011, 07:18 AM
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Yeah only 1 bolt was loose. So I am guessing that maybe the bolt got loose, and that allowed the crack to start and once it started it got progressively worse. Cause the noise sure got progressively worse. Seems I may have had a few days or weeks before it was ripped in 2...
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04-13-2011, 04:42 PM
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04-13-2011, 05:03 PM
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04-13-2011, 06:14 PM
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Did you use FIPG as threadlock? FSM calls for 3 threads of each bolt covered in a threebond 1324 or equiv threadlocker. That black goo could be the reason you lost a bolt
04-14-2011, 07:53 AM
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He doesn't have a right foot anymore.
04-14-2011, 08:04 AM
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This was what I found when I opened it up. I have had the truck about 6 years or so, so not sure who did this. I didn't see in the FSM about thread locker, just torque spec. Crap, now i gotta pull it back off?
04-15-2011, 02:10 PM
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