- Buick Ownership
- 64 electra 401
Hi everyone, 1st post here! I have a 64 Electra with a 401 4bbl and a th400. I’m working on it for a customer. When I got the car it was previously rebuilt only 2 years prior. Car had a bad shake 2 cylinders had low compression thought ok that will solve the shake. Valve seals were trashed bottom end looked great .030 over pistons, cross hatching looked good. Now she runs again and does run better especially at idle but at I’d say 1200-1500rpm it has a bad shake. All cylinders have good equal compression but after reading on the forums I’m thinking the flexplate was installed incorrectly. Can anyone verify this by letting me know if those seem like the right symptoms for the flex plate being installed wrong? Before I drop the transmission or is there a way to see if it’s placed right without dropping the trans.