Vibration after rebuild between 2,000 and 2500 rpms 96 z71 w/ 98 350 s

[15WCStamper]

Just got my truck back from having the engine rebuilt for 4 months. Started driving it and it was vibrating when it got past 2000 rpms. Does it while it's in park too so I knew it's not u joints are anything in the drive shaft. Any ideas? Not the clutch fan either.

[ifixedit]

Is it possible the vibration you're feeling actually a miss?

[15WCStamper]

Is it possible the vibration you're feeling actually a miss?

No it's to bad to be a miss and no codes are being thrown saying its a miss and it's coming from behind the engine so we think it's the torque converter.

[DarrellS]

Try to research what the balancing weight on your flywheel is supposed to be for you application and the same goes for the harmonic balancer ,

It would be real easy to have put the wrong ones back on the engine. Sometimes the outer ring on the harmonic balancer will move as the rubber

deteriorates .

[15WCStamper]

Try to research what the balancing weight on your flywheel is supposed to be for you application and the same goes for the harmonic balancer ,

It would be real easy to have put the wrong ones back on the engine. Sometimes the outer ring on the harmonic balancer will move as the rubber

deteriorates .

They are putting the torque concerts in today. It's got to be that or the flywheel cause we took the belt off of the pulleys and it continued so I guess we will see.

[DarrellS]

Hey Stamper . Any updates ??