Clunk during heavy acceleration

[Brett L]

Hi All.

Ive got a vt Calais. Ive just noticed a heavy "clunking" noise when i accelerate rapidly from a stop or if it goes back a gear and revs increase. Its a fairly loud noise that happens once and thats it.

Has anyone experienced a similar noise? Know what causes it?

Thanks.

 

[minux]

Mate it could be one of many thing's, which im sure you will find out, best bet is too drop by a driveline/suspension place and ask them to have a look, most place's wont charge you to take a look and let you know, this way you get straight to the problem.

 

[ruso]

I get a loud noise similar to what your saying however that's when I start my car. Sounds like its got to do with the starter motor. It only happens when the car decides to make it happen...lol. But I think it may be cause I turn the key in the ignition too much...who knows. Your best bet would be to have it checked out.

 

[VT-565]

Hi All.
Ive got a vt Calais. Ive just noticed a heavy "clunking" noise when i accelerate rapidly from a stop or if it goes back a gear and revs increase. Its a fairly loud noise that happens once and thats it.
Has anyone experienced a similar noise? Know what causes it?
Thanks.

Hi Brett,
i am thinking engine or gearbox mounts might be the root cause of your problem, allowing your drivetrain to contact the trans tunnel or firewall someplace.....
let us know how you go

 

[fitzy2005]

universal joints

 

[raff]

Maybe the prop shaft uni joints. The VX has rubber 'donut' dampners at the shafter ends in an attempt to reduce vibration and clunking- helps but doesnt solve! I believe the VT didnt get these rubbers and used the basic uni's which, like everything, wear out resulting in a clunk.

 

[Brett L]

update

Well heres an update: Was driving back to the office today, when all of a sudden gearbox made a funny noise and now it takes a while to change out of first gear from a stop (is rev's to over 3500 ). Went straight to a local workshop and since discovered reverse gear doesnt work either.

In the workshop currently being looked at. Im suspecting the Clunk may have been a pre - warning..