Vibration at 70 mph, not consistant....
#1
Vibration at 70 mph, not consistant....
I went and started my car today and as I was letting it run for awhile I was thinking about the things I need to do to it before I start driving it again.
I remember just before I put it away I was getting a vibration at 70+ mph. It wasn't there at 55 or 60 etc...
Well its hard to believe that its the wheels that need balancing because I haven't had this issue before. Its like it goes in and out its not a constant vibration, it will go in, vibrate for 3 or 4 seconds then go out for 2 seconds then come back. Any ideas?
Thanks!
I remember just before I put it away I was getting a vibration at 70+ mph. It wasn't there at 55 or 60 etc...
Well its hard to believe that its the wheels that need balancing because I haven't had this issue before. Its like it goes in and out its not a constant vibration, it will go in, vibrate for 3 or 4 seconds then go out for 2 seconds then come back. Any ideas?
Thanks!
#4
sad, but true. I used to have a 3 hour cruise back home over the summer, and i noticed that in and out vibration you talk of. alignment and rotors didnt seem to fix it. Put in u-joints and it seemed like that variation left, but now I have constant vibration at different speeds. I'm golden from about 50-70 mph, but above that I have vibration. I also seems to depend on the load applied. As refered to in another thread, it may be due to my poly mount. I havent had time to shim it out. But when I do, I will post results.
#5
Save the manuals!
iTrader: (5)
All of the late model F-bodies do it. At that speed with a near-stock suspension, there is a natural resonance and the car vibrates. All cars have this issue, but some are more noticeable than others.
More info: https://ls1tech.com/forums/general-m...nly-65mph.html
More info: https://ls1tech.com/forums/general-m...nly-65mph.html
#8
Bringing this back a bit... I just took it out of storage and as I was heading back home (stock rims and tires are on) it still vibrates 70 and on up.... I just got some poly engine mounts, and a poly torque arm mount for it. I guess if it still continues I will replace the u joints.
Any other suggestions?
Any other suggestions?
#9
Save the manuals!
iTrader: (5)
If it vibrates at all speeds above 70, you must have something wrong behind the transmission or at the wheels. Maybe a driveshaft out of balance or something like that?
I'd suggest investing in a GM Factory Service Manual. There's a whole section on diagnosing vibrations and several pages of a procedure where you can walk through calculations that will tell you if the vibration is coming from your tires or propeller shaft.
I'd suggest investing in a GM Factory Service Manual. There's a whole section on diagnosing vibrations and several pages of a procedure where you can walk through calculations that will tell you if the vibration is coming from your tires or propeller shaft.
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