XF Falcon Driveline Vibration/Noise

[Gab]

Hey, I've got an annoying vibration through the driveline in my XF. It seems to happen different amounts at different revs, and doesnt seem to happen as much (if at all) when it's not in gear. Now I've gone through all underneath the car, and checked to make sure every bolt in sight is as tight as can be, engine mounts are tight, gearbox mount seems fine. I changed the engine and transmission over myself, it was fitted with an EFI 4.1 and an Auto, but I put another EFI 4.1 and a T5 5 Speed Manual in it, could I have missed anything when I did it? I am also concerned about just how harsh and noisy the car is, I understand that having a lowered car with a 2.5" exhaust will be harsher than a normal vehicle, but this is beyond belief, it's like driving a big old 1930's Truck, although it goes & handles quite well. I know the exhaust is hitting on the underside of the car near the fuel tank, and that may create the illusion of driveline vibration, but I'm unsure

Cheers, Gab

[Jim]

I know the exhaust is hitting on the underside of the car near the fuel tank, and that may create the illusion of driveline vibration, but I'm unsure

Cheers, Gab

you just answered your own question. this will without a doubt cause the problems you are describing. fix this first before you do anything else.

[bigmuz]

Okay here is the thing:

You told us you lost your licence.

You told us you only have your ls.

Now you are complaining about some noise when you are driving your car around.

Are You For REAL?

Muz

[Gab]

I never said I lost my license DICKHEAD.

[fro]

So when does the vibration show up? When you hit 160km/h, or 200km/h? Or perhaps you've really stuck the boot into it this time, and found the vibration at 350km/h?

[Gab]

fuck off

[bigmuz]

What did you expect numbnuts

Muz

[Roadsailing]

found a job yet?

[2ofdem]

Its an XF they all sound like that

[Billzilla]

Its an XF they all sound like that

Yeah it's a shame more people didn't tick the option box that said, "Don't convert to taxi mechanicals seconds after the warrantee runs out."

[jmac]

In all seriousness it's probably the exhaust. You'd be amazed the incredible acoustics you can get by knocking two randomly selected engine parts together.

I can't speak for everyone, but the number of times I've seen second rate exhaust shops fuck up a job (so that it either tears or works loose inside a couple of weeks) on peoples cars is alarming. Which is why if I find a really top notch exhaust place, I rave about it. In this case Glenroy Exhaust (who are now more or less actually in Somerton)
are a class act to say the least.

John McKenzie

[Decadentia]

Might also be worth checking for worn universal joints in the tailshaft.

[Gab]

I found the problem, you guys wont belive it, it was because the car was running on 5 cylinders

[Roadsailing]

you arent going to believe this, but i find that amazingly easy to believe

[Bitsamissing]

Lucky you

200 kmh on 5 cyls = 40 kmh per cyl

Therefore, 6 cyl = 240 kmh ?

[mizone]

Tail shaft?

It may sound silly but if you esp. feel the vibration through the seat back then this should be checked.