I have a loud noise coming from underneath my truck, I think around the torque converter area. I raced a 383 stroker 70's nova and when it shifted from 1-2, it started making a rattle noise. I let off and it rattled for awhile. It eventually went away.

It came back a few minutes later. It usually makes the noise loud when I attempt to brake stall it. It also makes noise when decelerating. When I put it in nuetral, there is little or no noise. It seems the noise will go away as the rpm's go up.

Im open to any suggestions. Thanks!

 

Broken flywheel!

 

Sure is a broken flywheel symptom.

 

It is okay to drive it like that?

 

A fin in the torque converter could have come loose, just another thought.

 

no! not unless you want to pay for a new pump and flywheel