strange noise

[tenggo]

Hi there, just bought a vr sedan today, great engine and box seems fine, changes well and no slip, but when driving it home for the first time a strange sound happened. It drives fine from take off , even when giving it a bit, but if cruising at 100 and then give it some it made a sound from the back which i can best describe as the same as when you run over those wake up strips on the side of a freeway but a little louder and a little more metallic... it also happens under load like going up a steepish hill. any advise would be helpful, thanks

[jokerflingo]

Hi there, just bought a vr sedan today, great engine and box seems fine, changes well and no slip, but when driving it home for the first time a strange sound happened. It drives fine from take off , even when giving it a bit, but if cruising at 100 and then give it some it made a sound from the back which i can best describe as the same as when you run over those wake up strips on the side of a freeway but a little louder and a little more metallic... it also happens under load like going up a steepish hill. any advise would be helpful, thanks

You say from the back of the car so straight away i am thinking diff/suspension but since this was whilst cruising im leaning towards the diff. Is it a single spinner or LSD and do you happen to know when the last oil change was made on the diff?

[tenggo]

Hi, thanks for reply. No idea when the last oil change was done on it, i only got it yesterday. It is a single spinner i guess? it is a non irs axle and is an executive... I have been driving around today to test it out a bit and it only makes the noise if i am sitting around 100 (doesnt happen at lower speeds) and put my foot down or going up a hill and trying to maintain 100 it will make the noise too if i back off it goes away. I can accelerate from 0 to 100 , even with foot flat down and in wont make the noise...

[Meshuggah]

Hello There

Are you still having these issues?
Because I have the exact same problem!

I will explain what i have tried and the history of what caused it, If you have fixed it i will make a new thread. Unless you can tell me how you fixed it

[VS RB30E(T)]

I'm another victim of this problem, drives me nuts sometimes but it's not constant. Mine seems more prominent around 70-80 klicks. Let me know how it goes.

[Changa]

Yeah I have the same problem, I believe it is part of the transmission called the Torque Converter Clutch (TCC). I believe its faulty and isnt locking together properly, although I cant be sure. My mechanic said I would be better off replacing the entire tranny with a reco'd one instead of just replacing the TCC.

[hako]

Check the cheap options first - rear engine mount in particular...also 2 front mounts....check exhaust from ex manifold to tailpipe.....centre bearing on the propshaft also the uni joints. A reco trans will cost upwards of $2000 so hope it is not that.
Good Luck.

[Meshuggah]

Hey Guys,

I Think there are 2 different issues here, But they are very similar.

The first one, Is the one thats sounds like your running over (cats eyes) wake up strips.
I had this problem with my Commy, now it IS a gearbox fault, what i found is it was the Torque converter Skippin or bouncing. To confirm this there is a fault that comes up in the cars PC, "autotheft dect" (or something similar) even thou that sounds completly off topic it actually means that the ignition is causing the torque converter to bounce/skip and the simple fix for this is to change your plugs and get new leads. This resolved the issue for me.
I know that sounds werid ,but it is definatly the fix for that issue.

But by leaving this for to long I think I have damaged my gearbox and now im getting a completly different gearbox noise.
That sounds more like a groan at certain revs over 80-100km.And you can feel it get sluggish whilst it is doing this noise, If you take your foot off the accelerator or drop it down a gear the issue goes away.

Any ideas for this? Im just assuming im gonna need a new torque convertor or just get a new Gearbox, both these issues involve pain / cash