dpuwookie79 11 Report post Posted August 4, 2011 Whenever I rev up the car ('69 vert 302 automatic)...whether it be in neutral or in gear, I get some vibration. Given that it happens in neutral, I'm confident it's nothing to do with the transmission or anything behind it. So...what does this leave me with? Harmonic balancer...flex plate...fly wheel? I've read some cases of guys having the wrong flexplate on their '69 engine...for example, some guys found they had a flexplate from a mid 80's 5.0 mustang on their '69 engine...which causes vibration because its heavier than what they used in '69. The number on my flexplate is EOST-AA...which I can't seem to find a reference to anywhere. I talked to a guy at a shop yesterday and he mentioned the part #C5AE-A being correct. Can you guys confirm/deny this? I'm having trouble finding info on this. Thanks! Quote Share this post Link to post Share on other sites
Max Power 74 Report post Posted August 4, 2011 Did this happen all of a sudden, or is this a fresh build? Quote Share this post Link to post Share on other sites
LoneWolf2U 136 Report post Posted August 4, 2011 The E flexplate is from 80"s and prob a 50oz. The C plates are 28oz balance weight, most likely your vibration problem. Quote Share this post Link to post Share on other sites
dpuwookie79 11 Report post Posted August 4, 2011 I bought the car on the verge of death. Did all the metal work and restored the body. Now I'm working on getting the engine & drive train "right". I have very little time on the engine since we just put it back in this spring and it was undrivable when we bought it. This vibration has been consistent since we've reinstalled it, though. Quote Share this post Link to post Share on other sites
dpuwookie79 11 Report post Posted August 4, 2011 The E flexplate is from 80"s and prob a 50oz.The C plates are 28oz balance weight, most likely your vibration problem. Great, thanks Mach. I'll see if I can find something with the C-code on ebay! Quote Share this post Link to post Share on other sites
Max Power 74 Report post Posted August 4, 2011 On an engine with unknowns, I would be attempted to tear it down, measure bearing clearances, and send the entire rotating assembly out for re-balance. Quote Share this post Link to post Share on other sites
MikeStang 247 Report post Posted August 4, 2011 I think I have a plate off my 69 351 motor here at the house....you van have it if you pay shipping....let me know Mike Quote Share this post Link to post Share on other sites
dpuwookie79 11 Report post Posted August 5, 2011 I think I have a plate off my 69 351 motor here at the house....you van have it if you pay shipping....let me know Mike Actually, I have a buddy who has one locally. Thanks for the offer, I appreciate it! Quote Share this post Link to post Share on other sites
dpuwookie79 11 Report post Posted August 5, 2011 I think I have a plate off my 69 351 motor here at the house....you van have it if you pay shipping....let me know Mike Actually, I have a buddy who has one locally. Thanks for the offer, I appreciate it! Quote Share this post Link to post Share on other sites
