? Why do vibes not appear like crazy when you load the rear down with weight and really squat the suspension? [/QUOTE said:They do and frequently. I've had to dial around them many times.
? Why do vibes not appear like crazy when you load the rear down with weight and really squat the suspension? [/QUOTE said:They do and frequently. I've had to dial around them many times.
For the same reason that most folks don't get out of control vibes at lower speeds.Why would a drive shaft that is perfectly happy all of a sudden not be happy when the only change made is a change in gearing?
He is trying to make the point that with a steeper trackbar angle, the lateral shift is higher as the suspension cycles.Where I'm a little confused is with the trackbar mount. If you are cruising at ride height down the highway, how could the trackbar angle matter?
He is trying to make the point that with a steeper trackbar angle, the lateral shift is higher as the suspension cycles.
I answered your question. Do you have a different question?For pinion angle reasons sure. But not because the suspension compressing makes the track bar move the axle over and create vibration from lateral angles not being exact.
For the same reason that most folks don't get out of control vibes at lower speeds.
Minor but when you deal with them enough, you learn a few things. One is the pinion is forgiving when low and not forgiving when high. So, it is very easy to set them a tiny bit low to compensate for the small rise in angle under the minor squatting that happens when wind load increases.Sounds like the mid arm has some pinion angle changes through travel.
You have to turn the driveshaft faster to go faster. The driveshaft turns faster when you regear lower.Clear as mud.
You have to turn the driveshaft faster to go faster. The driveshaft turns faster when you regear lower.
Minor but when you deal with them enough, you learn a few things. One is the pinion is forgiving when low and not forgiving when high. So, it is very easy to set them a tiny bit low to compensate for the small rise in angle under the minor squatting that happens when wind load increases.
The vibes do not change at the same rate the suspension moves and are instead a cyclical harmonic that travels fore and aft through the rig whenever the resonant frequency is reached. If pinion angle were responsible fully, that frequency would change when the suspension moves and it doesn't.
I never had a hub kit.
I know, but removing the front driveshaft is the same effect, which is what I was trying to ask.
They are not exactly the same as to what happens in the front axle. But in terms of load on the tcase, perhaps you can consider them to be similar.
So then maybe a hub kit would help your case?
Not likely in my opinion (and both Dave's/6states opinion too). Which is why I haven't had the immediate urge to buy the kit or new wheels.
I am curious to see what happens to the vibrations with the new suspension. Might be foolish of me to be spending the money on the suspension. I felt I have exhausted all other options at this point of time. Even re-regeared the rear (Dave set it up) and no change.
Perhaps a bit extreme, but has anyone removed BOTH driveshafts and had someone flat tow them at highway speeds?
In a more extreme case of tracking down vibes, you could pull the inner shafts and drive with the driveshaft connected if you suspect an issue that hubs may solve.They are not exactly the same as to what happens in the front axle. But in terms of load on the tcase, perhaps you can consider them to be similar.