440 ViBrAtIoN

[rick_rawker]

We just picked up a runnning 440 in a motorhome to put in my son's '63 Belvee. It has a steady vibration that starts at around 1500 rpm's ( in Park )
What should we check-out ? Will the harmonic balancer go bad ? Will the trans flex plate go out of balance ?
Thanks, Rick and CodyClovis

 

[69HEMICORONETR/TCONV]

could have a forged crank balancer on a cast crank engine, I have seen that before.

 

[74sundance]

I'd bet money it's a balancer,they have rubber in the center to hold the to parts togather and the outer shell will turn on you.Some times you can turn the outer part of the balancer by hand and the crankshaft stays put.

 

[rick_rawker]

I'd bet money it's a balancer,they have rubber in the center to hold the to parts togather and the outer shell will turn on you.Some times you can turn the outer part of the balancer by hand and the crankshaft stays put.

Thanks, I'll check it out. Any idea where a good one can be bought ?

 

[rick_rawker]

could have a forged crank balancer on a cast crank engine, I have seen that before.

Thanks, that's a thought. This motor 'seems' to be original and only has 30,000 documented miles though. I will still check it out !

 

[Meep-Meep]

could have a forged crank balancer on a cast crank engine, I have seen that before.

Yes, or my guess is the engine you got has a cast crank and that's not compatible with your original forged crank torque converter. If that's the case you might still be able to get the weight package from MoPar Perf and tack weld it to the converter (instructions included). As long as you're careful you could do it with the engine in the car. Check the balancer to see if it has a big weight on it or says "use with cast crank only".

 

[rick_rawker]

Yes, or my guess is the engine you got has a cast crank and that's not compatible with your original forged crank torque converter. If that's the case you might still be able to get the weight package from MoPar Perf and tack weld it to the converter (instructions included). As long as you're careful you could do it with the engine in the car. Check the balancer to see if it has a big weight on it or says "use with cast crank only".

Thanks, will do !

 

[74sundance]

Not sure where the best place would be for you to get one.Just check with your local parts dealer...I've seen some spin on them selves because the rubber breaks down prematurely from fluids leaking on them.You could also paint a white line across the front of the balancer from top to bottom,start the motor up a few times,rev it to see if the marks still line up after.

 

[moparstuart]

Yes, or my guess is the engine you got has a cast crank and that's not compatible with your original forged crank torque converter. If that's the case you might still be able to get the weight package from MoPar Perf and tack weld it to the converter (instructions included). As long as you're careful you could do it with the engine in the car. Check the balancer to see if it has a big weight on it or says "use with cast crank only".

yes i bet also you uhave a cast crank and those motors are external balance so you need the big harmonic balanced and the weighted torq converter to make it balanced , like meep meep said

 

[72 Charger SE]

Yes, or my guess is the engine you got has a cast crank and that's not compatible with your original forged crank torque converter. If that's the case you might still be able to get the weight package from MoPar Perf and tack weld it to the converter (instructions included). As long as you're careful you could do it with the engine in the car. Check the balancer to see if it has a big weight on it or says "use with cast crank only".

This would be my best guess also, especially if you just transplanted the motorhome engine into your car with the car's existing drivetrain.