Vibration at 40kmh solved

[VZ SV6 REBUILD]

Hi all, 3yrs ago I replaced my Centre bearing with an eBay special. A few months later a vibration started, hardly noticeable, only under load and only at 40kmh. First thing I checked was the centre bearing. It looked fine, shaft felt solid. All other mounts uni's etc checked ok.
As I said hardly noticeable so I just put up with it.
About a year and a half later I installed a Nolathane diff mount bushing, made no difference the vibration continued. Centre bearing looked fine.
A month later I convinced myself that it must be the rear trans mount so I replaced it. Vibration continued. Centre bearing looked fine.
By this time it was doing my head in, I could tramp it at any other speed and no vibration what so ever only at 40kmh. I thought oh well, eventually something will break and I'll know what it is.
6 months later it finally started to get worse, slight vibration at 20kmh and a bigger vibration at 40kmh but ONLY under load. Centre bearing still looked fine.
Over the next few months it continued to get worse then bang, now I could feel exactly where it was coming from, the CENTRE BEARING.
The noise was horrendous with just the slightest acceleration and I was 100km from home. To my amazement once I got over 45kmh the noise disappeared completely even at full throttle. So I drove it home no problems.
The rubber section and bearing were in great condition but the bearing cage had broken away completely. It must have been cracked all this time but not visible.
The moral I suppose is go genuine, it lasted 15yrs with no headaches.

 

[losh1971]

Yep, I'm a big advocate for gen centre bearings whenever possible, having had an aftermarket one fail pretty quickly on the old VR ute.

 

[Immortality]

Strange failure though, not seen that before.

 

[krusing]

I installed a $21 after Market one from Gallop Autoparts on my Adventra in September 2021,
And it's still fine.
(Which is now $27 for the same thing)

I have checked it a number of times, and still looks new, and check for any movement, and its still solid.

I have never seen one break like yours had, thats had a massive amount of torque on that bracket.
Either it was faulty, or your driving it very hard.

 

[lmoengnr]

Looks like the was a lot of stress at the outer spot welds...

 

[VZ SV6 REBUILD]

I installed a $21 after Market one from Gallop Autoparts on my Adventra in September 2021,
And it's still fine.
(Which is now $27 for the same thing)

I have checked it a number of times, and still looks new, and check for any movement, and its still solid.

I have never seen one break like yours had, thats had a massive amount of torque on that bracket.
Either it was faulty, or your driving it very hard.

I did a few mods to the motor and it goes hard but it still NA so not massive amounts of power. 90% of the time I have my kids in the car so it doesn't get driven very hard too often.
I will admit that there was a few 0-160+ runs when I first built it