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Old 12-23-2011, 04:00 PM   #11
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If its the rear driveshaft, its only possible to be out of alignment by 180degrees as the U-joints MUST both be in the same plane.
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Old 12-23-2011, 05:20 PM   #12
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The ix driveshaft only has one u-joint...


Unless you pulled the slip yoke off, its not really possible to misalign it. It doesnt matter how you put it back on the car - but it's probably worth checking the dots on the driveshaft in case the mechanic messed it up.
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Old 12-24-2011, 02:57 PM   #13
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I will try driving it a bit. I talked to the mechanic, who said that since there is no carrier bearing, there is only one way to put it back on. Is the same true for the front?
I guess I am slightly confused on the rear driveshaft's orientation. If from the transfer case it connects to a guibo and from there connects to a universal (which should be good else he would have replaced it ) and then to the rear-most u joint. No splines directly involved.
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Old 12-24-2011, 03:36 PM   #14
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yes

the only exception is if he pulled the driveshaft off the rear yoke, then it is possible to misalign it. you can check though to see if the white dots still line up (hopefully they are still visible).

there is no front U-joint. there is only a U-joint at the yoke that connects to the rear diff.
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Old 12-27-2011, 12:11 AM   #15
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Here's my theory that I will check tomorrow. I have the exact same issue. I put in a new/rebuilt ds and have the vibration you describe. Even though the old ujoint was shot, I didn't have this much vibration. I've also replaced the worn wheel bearings to no avail.

I suspect the I didn't extend the ds far enough to properly preload it into place. If that doesn't do it, then I'm fairly confident the input bearing on the diff might be worn, allowing the wobble. But this would not explain why replacing the ds was the only difference between no vibes and vibes.
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Old 01-02-2012, 12:55 PM   #16
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Mechanic drove it and believes it is tire flat spots. So we inflated the tires to 40 psi and we will see. car is pretty tight otherwise. I have some bottlcaps with ancient tires on them, but I dont know their true condition and the could be worse. So I will keep you posted! Happy New Year!
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Old 01-15-2012, 12:21 AM   #17
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Well after a couple weeks driving around the tires do not seem to have rounded their flat spots. If that is the problem. I am still trying to understand exactly what gets out of alignment that weights and shaft orientation correct.
For the rear, there is no CSB, and there is a new transfer case. So any orientation being 180 off (rear u-joint) or 120 off (3 hole connection into the guibo/transfer case), but one of the two points of reference are gone - the trasnfer case (new) and the rear diff. Similarly on the front.

So it almost sounds that for trhe rear, there are 6 possibilities (3 for front and 2 for rear)
and the front shaft has 3 (guibo connection ) or dozens (splines into front output shaft of transfer case?)

The car did not have this problem before, and it seems to be in the steering wheel and the seat, implying a problem in front and rear.
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Old 11-20-2014, 02:28 AM   #18
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Have you found a solution to your vibration problem? I have a similar issue (and a myriad of other more serious issues at the moment) where I only get vibrations from 60 - 75 mph and I hear a subtle click when I start out in 1st gear. I am confused though because after reading through different posts I do not know how many guibos our cars have. I thought there were just two (front DS and rear DS) and then a U-joint that connects to the rear differential. Are both/all the guibos the same part?
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Old 11-23-2014, 06:16 AM   #19
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2 guibos, one at the TC output to the rear DS, and the other at the input to the front diff from front DS.
The rear DS has guibo on front end, Ujoint at the back end. The front shaft has guibo at front end, solid at the TC end.
Technically there is another flex disc between the trans and TC but it's pretty solid.

Vibration could be man many different things, a lot of which can be inspected visually. Look at your CV boots/joints, trans mounts(they're rubber and can rot out), subframe/trailing arm bushings, etc.
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Old 11-28-2014, 12:44 AM   #20
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Quote:
Originally Posted by rtwaits View Post
The vibration occurs in neutral too.
As in, car stationary + neutral? If that's the case, it sounds like your flywheel/clutch/pressure plate is unbalanced/badly aligned/off centre.

Checked engine/transmission mounts?

Edit: oops, didn't realise this was related to an iX - no idea about those, sorry.
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