Drive Line Vibrations

[Sara Pax]

Hi Guys,
On my vs series II calais when i go to slow down and change from Drive to 3rd i get this vibration
it seems to be from 100kms to about 75 kms on de-acceleration
I am thinking it might be a tail shaft problem
driving it normally it doesnt show any vibrations until you slow down
All ideas or Experience appreciated

 

[greenfoam]

If you can drive along at 70 in 4th with no vibration then select 3rd and accelerate to 100-120 with vibration the whole time in 3rd it will be a cracked rubber gearbox mount. New ones from Holden are about 50 bucks. Try that test. I've got a feeling alot of Commodores have that problem but most people just don't notice

 

[greenacc]

If that don't work check the centre bearing on the tailshaft, it could be loose or stuffed, but is generally noticed on acceleration not slowing down

 

[Dodgy_Dave]

but is generally noticed on acceleration not slowing down

Like In my car.

I had a sneaking suspicion that it was either engine or gearbox mounts.
If left untreated, would it then stuff the tailshaft unijoint?

 

[hako]

Like In my car.

I had a sneaking suspicion that it was either engine or gearbox mounts.
If left untreated, would it then stuff the tailshaft unijoint?

Eventually it will hasten a drivertrain problem but its all a balance between available dollars and how long you will keep the car. Its easy to check - just slide under the car and grab the back of the transmission where the tailshaft enters it and try and move sideways and up....if it moves more than a whisker then it needs replacing...especially if its covered in oil.:thumbsup:

 

[DannyboyDS]

I like the above post the most, get under and look, areas to check would be tailshaft (for movement etc, etc) also check the uni's while your there and have a look at the engine mounts too just incase.

 

[NVE_069]

Yeh mine does it but only when speeding up not slowing down gettn dirty tomorrow to c what the problem is but i have always though Gear box mount.

 

[Sara Pax]

Did you find the problem

 

[Sara Pax]

Well i finally got under the car for a look at this problem as i had to look at something else as well
Well i found the front Uni Joint stuffed on the drive shaft
I had the suspected the drive shaft might have been the problem
So its getting re-built on Friday

 

[jas98]

glad u found the problem

also another thing with these cars (vn-vs) is the gearbox mount bolts tend to work themselves loose...mainly on the vn nd vp (haven't had a prob on any vr/vs yet)