Knocking noise in D and R after high revs

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Truck82

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This knocking noise just started happening after I did a couple high revs in the driveway. It only starts knocking in Drive and Reverse. Sounds just like a rod knocking but obviously isn’t that. I don’t know what else to say but I can answer any questions. Thanks in advance!
 
squaredeal91

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Check your flexplate for cracks. It's an auto right?
 
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squaredeal91 said:
Check your flexplate for cracks. It's an auto right?
Click to expand...
The flexplate checked out ok. No cracks.
But I found that there is play between the flexplate and torque converter. Is this right or should they be tightened together?
 
Truck82

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Ricko1966 said:
They should be tight together.
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Good to know. Still doesn’t fix the problem though because if that was causing the noise then I would hear it in park and neutral, right?
 
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Has the oil pressure dropped?
 
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Truck82 said:
Good to know. Still doesn’t fix the problem though because if that was causing the noise then I would hear it in park and neutral, right?
Click to expand...
Not necessarily. Especially since it's not loaded in neutral and park.

Cars are strange creatures. They can make any noise sometimes different noises for the same problem, and do it whenever they want or don't want to do it. Temp has an effect on stuff also. Even which way the truck is sitting can change stuff.

One thing when working on cars is for certain, nothing is for certain.
 
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PrairieDrifter said:
Not necessarily. Especially since it's not loaded in neutral and park.

Cars are strange creatures. They can make any noise sometimes different noises for the same problem, and do it whenever they want or don't want to do it. Temp has an effect on stuff also. Even which way the truck is sitting can change stuff.

One thing when working on cars is for certain, nothing is for certain.
Click to expand...
I wasn't going to go that in depth he knows he has an obvious problem,which needs fixed before he goes any further. I've done this and this and this and this,and it still knocks. Ohh I tightened the flex plate hardware and the noise is gone.
 
Truck82

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fast 99 said:
High revs? how high? Winding an unloaded motor excessively can be very detrimental to longevity.
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Two full throttle revs. Just real quick
 
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Truck82 said:
Two full throttle revs. Just real quick
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Maybe one or more of your TC-flexplate bolts has come loose. Whatever it is, fix it and let us know if you still hear/feel the knocking.
 
Truck82

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NickTransmissions said:
Maybe one or more of your TC-flexplate bolts has come loose. Whatever it is, fix it and let us know if you still hear/feel the knocking.
Click to expand...
This was it. Don’t hear the knocking anymore but if it happens once… it can happen twice. Is there something I should do to keep them from backing out again?
 
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