Update! Checked almost all of the things mentioned in this thread and it turned out to be a transmission mount that had been checked previously, but clearly not thoroughly enough. I appreciate all the replies! I think the EVA helped in narrowing down what to focus on. It wasn't the tires/axles...
Yes, I believe it is something that developed on it's own, but there has been work constantly being done to it, though not necessarily to the engine/trans at this time. I thought it might be related to firing because there was a 1/2 order vibration when the vehicle was parked and revved. (Did...
Thank you, I really appreciate the response, Brian! I'll try to answer your questions the best I can. The vehicle is indeed "prehistoric", it's a 45 year old Dodge van. While it was certainly no luxury ride to begin with, this vibration is definitely new and not normal. It has had a replaced...
Thanks for the insight. Do you think I may have a 3rd gear issue and/or crankshaft-speed related issue? Is it best to change the tires first and then retest to see if other vibrations resolve?
Understood that an engine always vibrates. I was more trying to understand how to differentiate the "good" vibration from the "bad". I assume it would be done by amplitude when you take a reading, so a normal vibration that is of no concern would have a much lower amplitude than a vibration...
Hi Greg,
Thanks for the reply! Question about your response to #3: What do you mean it "doesn't happen"? An engine that does not have any anomalous vibrations would still vibrate - I'm wondering how this would look on an EVA? I'm guessing the amplitude of the vibration is what would be...
Hello,
First, I am so glad I found this forum! I am a mechanical engineer/auto enthusiast and I am trying to diagnose vibration problems. I've done a bit of research so not entirely starting from scratch, but have a few questions:
1. When it says to determine if the vibration is engine speed...
