converter question

[itsbacon]

hey yall, i have a '71 newport with a cast crank 383. i put a factory high stall for a cast crank 400 in the car and it woke it up big time. the weights looked the same and i, uh, assumed that they were the same but........there is a slight vibration at speed. after reading the vibration thread that bull posted it occured to me that i may not have nailed down the bellhousing bolts. do yall think that there is enough differance in the rotating weight between the 383 and 400 to cause a vibration. in the morning i will double check the bellhousing bolts and drive her again to verify. what do yall think about the converter?

[Ghoste]

Does the vibration occur only under movement or can it be felt when the car is in neutral and revved up?

[andy74]

cuda ken swears by that convertor,pm him,or wait for him to chime in!!

[John_Kunkel]

The cast crank 383, 400 and 440 all use the same converter weight.

[RD]

The cast crank 383, 400 and 440 all use the same converter weight.

they are just located in different areas on the converter.

[itsbacon]

thanks guys, looks like it was the bell housing bolts, or the lack there of. hope i didn't tear the front seal out.