Hello, wondering if anyone has advice/experience in this area.
I have a 68 that I bought taken apart but with a rebuilt 74' 302 and rebuilt C4 transmission. Got it all put together but there is a pretty bad chatter vibration at moderate RPMs. This is parked or in neutral. If you take a short drive it is of course pretty impossible to drive faster than 25 or 30. Origninally this car had that same c4 and a 289.
I have access to a full lift shop. Already replaced the harmonic balancer and flexplate (28 oz offsets). Took the c4 out twice this weekend removed and drained torque converter. Ran the motor with new balancer and flexplate installed but with torque converter purposefully left off. Engine ran smooth as a baby's behind. No problems at all RPM ranges.
R&R the tranny again today with the new (brand unknown) converter installed and fluid. Vibration came back immediately. Infact it's even worse now. So thoughts are that there is either a bad or incorrect torque converter (all bolts line up through the flex, even the drain plug and yes it has some play....not too tight) or the tranmission input shaft or something else inside the trans. Our shop foreman said he felt the vibration was coming from the bell housing when he was under the running car.
Stock type torque converters seem like they are hard to find! Anyone else have this issue where it was down to converter or tranny?
I have a 68 that I bought taken apart but with a rebuilt 74' 302 and rebuilt C4 transmission. Got it all put together but there is a pretty bad chatter vibration at moderate RPMs. This is parked or in neutral. If you take a short drive it is of course pretty impossible to drive faster than 25 or 30. Origninally this car had that same c4 and a 289.
I have access to a full lift shop. Already replaced the harmonic balancer and flexplate (28 oz offsets). Took the c4 out twice this weekend removed and drained torque converter. Ran the motor with new balancer and flexplate installed but with torque converter purposefully left off. Engine ran smooth as a baby's behind. No problems at all RPM ranges.
R&R the tranny again today with the new (brand unknown) converter installed and fluid. Vibration came back immediately. Infact it's even worse now. So thoughts are that there is either a bad or incorrect torque converter (all bolts line up through the flex, even the drain plug and yes it has some play....not too tight) or the tranmission input shaft or something else inside the trans. Our shop foreman said he felt the vibration was coming from the bell housing when he was under the running car.
Stock type torque converters seem like they are hard to find! Anyone else have this issue where it was down to converter or tranny?