Changed d/s, now vibration
Launching!
Joined: Oct 2004
Posts: 251
Likes: 0
From: Ohio
Originally Posted by jimmyblue
I don't think the natural resonances of steel or aluminum
shafts are at the vibration frequency he's talking about
here. And as to why the "better" steel shaft would make
vibration worse, I can't surmise on the materials basis?
Still think it has to do with the mass the U-joints have
to push around, pinion angle and maybe the absolute
joint angles in this case.
shafts are at the vibration frequency he's talking about
here. And as to why the "better" steel shaft would make
vibration worse, I can't surmise on the materials basis?
Still think it has to do with the mass the U-joints have
to push around, pinion angle and maybe the absolute
joint angles in this case.
Thread Starter
Joined: Jan 2002
Posts: 1,802
Likes: 36
From: Dutchess, New York
Well, I haven't changed the u joint yet. I have a spare but haven't swapped them yet. Now I start to feel a vibration slightly at around 80 with the aluminum one, so may be a wheel imbalance or bent axle. With the 3" chro-mo shaft, it is alot heavier, so I am thinking it amplifies the vibration, and that along with the poly trans and suspension mounts, is simply transmitting more vibration to the cabin. The whole car doesn't shake or anything, I just can feel a bit of a humming vibration. I'm beginning to think more and more, that since I haven't driven the T/A as much, and am now driving the Blazer 95% of the time, I forgot that T/A does give a bit harsher ride. I'm going racing this weekend, so if I'm feeling bad things at 100mph, then I'll know its something a little more serious.
Our problems must not be as similar as I thought then. My problem starts about 60-65mph, and by 75 or so, the change in the cup holder is jumping all over the place.
Here's my thread for reference:
https://ls1tech.com/forums/gears-axles/225429-vibration-over-65mph-twisted-driveshaft.html
What you're describing sounds kind of like what you get with a stiff suspension, and the vibration just kind of goes with the territory. How long have you been driving around with your current suspension/bushings?
Here's my thread for reference:
https://ls1tech.com/forums/gears-axles/225429-vibration-over-65mph-twisted-driveshaft.html
What you're describing sounds kind of like what you get with a stiff suspension, and the vibration just kind of goes with the territory. How long have you been driving around with your current suspension/bushings?
Thread Starter
Joined: Jan 2002
Posts: 1,802
Likes: 36
From: Dutchess, New York
Well, the poly trans mount went on back last october with the new clutch. Drove the car 3 weeks, then it sat most of the winter. T/A with a poly mount went on this spring, but I've only put about 1500 miles on it since. So that is what leads me to believe maybe it is an unfamiliarity with the car. I was just a bit overly cautious as I do not want something in the driveline to let go at 100+ mph because of undue stress from something being out of balance. But I would not say my vibration is near as bad to the point where the change is jumping around in the cup holder!
