If it is the flex plate, usually they just crack. Don't know if warming up would affect that or not.

 

the transmission was rebuilt a few months ago the mechanic said he flushed all lines and checked the converter he said was all good. the transmission shifts just fine but after warm up i get a grinding noise at idle.

 

If the trans was rebuilt, the torque converter should have been replaced with a new one.

 

it never was so im thinking now thats what the issue is

 

If it wasn't replaced then that would be a real good place to start!

 

ok im looking up pricing now and will look at the plate in the morning to see if all bolts are tight and see if its cracked

 

Let us know what you find. Good luck and sorry I couldn't be more help.

 

i believe you helped a great deal i was hoping it was motor related and all the feed back i am getting it is been narrowed down to the 2 things you may believe might be the issue. im just not looking forward to helping in the removal of the tranny. because its one of the biggest that ford makes for this truck.

 

sorry hoping it WASNT motor realted

 

Yeah, they are heavy! I took one out of a 4x4 by myself a few weeks ago. I used a floor jack and a lot of foul language! LOL!

 

If the trans is under warranty I'd bring it in and let them look at it

 

the tranny will be under warranty the converter will not be

 

I checked the plate I don't see a crack but that doesn't mean their isn't one. But I do have a small vibration that I haven't noticed before

 

The only one that I've ever seen cracked had two cracks that connected three of the bolt holes where it bolted to the crank, all the torque convertor bolt holes were undamaged.

 

okay so after i checked the plate for cracks thru the inspection plate i left the plate off let the truck warm up for 1 hour in the yard then took it for a 40 mile drive and the dam thing never made a noise. so i am beside my self. from everything i've been told here and from friends im going to use the truck, if it happens again i will replace both the converter and the plate. thanks all the help on here