Wheel balance (shake)? Bad pinion angle will cause a vibration under load. Also check slip yoke bushing in the tail shaft. Move the slip yoke up & down to check for excessive play. I've seen a bad bushing cause a vibration under load. Oh yea prop balance too.
67 289 engine vibration
On the freeway most noticeably above 60 mph, when on even flat road if I let off the gas, no problem, but when I give just enough to maintain speed I get a heavy vibration/shaking feel from the engine. Not violent like something is breaking, just too heavy to feel right. Doesn't do it when accelerating or when I let off the gas. I haven't started to try to diagnose yet... maybe vacuum advance? or ignition/timing?
Any thoughts or help appreciated!
Any thoughts or help appreciated!
1 - 1 of 17 Posts
1 - 1 of 17 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Ford Mustang Forum
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Recommended Communities
