Bad vibrations on freeway...help!

jet111 · 22-04-2006, 08:52 PM

I bought a EF XR6 last night and when you take your foot off the throttle the cabin starts to vibrate. No vibrations come through the steering wheel but the whole car shakes quite badly especially at high speeds.
Is this a common problem or anyone ever experienced this?

Thanks Mark

NZ · 22-04-2006, 09:10 PM

First thing I'd check is the tailshaft flange bolts onto the diff. Then check the tailshaft uni joints.

jet111 · 22-04-2006, 10:10 PM

sweet as i will look into it

falcon91 · 22-04-2006, 10:36 PM

When you test drove it, which I'm sure you did?? What did the previous owner say it was??

jet111 · 22-04-2006, 11:14 PM

i didnt test drive it at high speeds and had a mechanical inspection but they didnt pick up anything

Eu-GenixX · 22-04-2006, 11:27 PM

my guess is something to do with driveline...

but does it make a flapping type noise when turning a particular direction... at medium sorta speed.. (60 km/h)

i had a problem at speed of the whole car shaking... (in a mirage tho).. and turned out to be massive eggs in the tyre surface.. not the wall.. but in the tread... replaced the wheels.. problem gone...

but your symptoms sound slightly different...

fmc351 · 23-04-2006, 12:07 AM

Maybe the ally tailshaft has been pulled out, and steel used. ???Tailshaft whip???

Tiga_EL · 23-04-2006, 08:46 AM

The tail shaft is prolly rubbing on something, my car does that at 80-85 km/h. If you accelerate you cant feel it once you let go of the accelerator it starts vibrating. Thats my guess as to what your problem could be.

RG · 23-04-2006, 09:25 AM

What sort of speed are we talking here?

Dodge · 23-04-2006, 09:31 AM

could be rims, wheel bearings, bent drive shaft, axle, could be a option for lesbians too

RG · 23-04-2006, 09:36 AM

Broken engine mount or gearbox mount maybe? I had a bent tailshaft in mine once and it vibrated like hell all the time so if it only happens off the power I would doubt that it's that.

jet111 · 23-04-2006, 10:14 AM

Quote:

Originally Posted by GreenEL

What sort of speed are we talking here?

It does it at 110km but not badly and only when off the power We were curious to see whether the problem went away so we took it up to 140 and the whole cabin started shaking even whilst accelerating.

RG · 23-04-2006, 10:20 AM

Quote:

Originally Posted by jet111

It does it at 110km but not badly and only when off the power We were curious to see whether the problem went away so we took it up to 140 and the whole cabin started shaking even whilst accelerating.

Sounds like it could be the tailshaft then. Best bet is to take it to a driveline/diff joint and get them to sort it out.

RG · 23-04-2006, 10:21 AM

Also is it manual or auto?

Fairlane · 23-04-2006, 10:29 AM

Put it in neutral at 110 and see what it does, might be an idea, it will be able to narrow it down a bit anyway (do this on a private road)

jet111 · 23-04-2006, 05:19 PM

It's a manual

RG · 23-04-2006, 05:23 PM

Quote:

Originally Posted by jet111

It's a manual

I also had a problem with a bent mainshaft in the box when I got my first T5 that was out of a wreck. Your car ever been in a prang?

jet111 · 23-04-2006, 05:32 PM

Quote:

Originally Posted by GreenEL

I also had a problem with a bent mainshaft in the box when I got my first T5 that was out of a wreck. Your car ever been in a prang?

Not until we hit a roo on the way home!!! But the car was vibrating before this happened and there is no damage apart from a destroyed front bar and scratched radiator. The car still drives 100% no loss of power and Temp is completely normal.

RG · 23-04-2006, 05:33 PM

I'd be tipping a bent tailshaft or bent rear axle.

mcflux · 23-04-2006, 11:39 PM

I'd say it's a uni joint. My 335,000km-old ones were buggered and would vibrate at around 130kph (with the 4.11s, meaning the tailshaft gets much more of a workout), and when I had the unis replaced both front & back that fixed the problem.

You could probably do the unis yourself if you're good with a spanner (I'm not!)

-Dave-