Rattle on bumpy Roads, out of ideas

[chunky79]

Both unit 20 and other chap are saying the same thing.

Torque converter?

Do you have a wooden leg at all yorky bar? It could be that rattling!

Your car's the one with the Cognac interior isn't it? I would sell it as it could be bad luck, fancy swapping?

[yorkrs6+]

Not from that area, but I have taken everything out, inc glovebox, door storage etc

[Daveperc]

My guess is that it's the bearing in the central support on the propshaft on it's way out. I had this problem though the symptoms weren't identical, and it wasn't immediately evident - just gradually got worse. It's the only component heavy enough to give the kind of symptoms you mention

The Audi fix is a complete new shaft (c £950 IIRC), but Doug at MRC managed to get a replacement bearing from the US and then split the shaft to put it in - a lot cheaper than a full shaft (if you see what I mean!!)

Dave

[yorkrs6+]

I have had a new propshaft fitted (unit 20) and paid something similar - I don't think it's that.
Iike I said most the drive train and suspension has been replaced. This final noise was there before all this was done, and annoyingly still present after!!

[ahoooga]

One more time of asking , have you had anyone sit in the car with you to find exactly where the noise is coming from ?

Where abouts are you ? , you 'might' even have a friendly forum member living close by who could help you find it

[yorkrs6+]

Yes but neither of us could be sure
Think I'm going to have to strap some cameras under the car to see what's happening...

[chunky79]

Both unit 20 and other chap are saying the same thing.

Errrrrrr, what are they saying it is????????????????????????????????????????????????

I would hate to think how much you have paid to keep this noise.

[yorkrs6+]

A Fellow forum member sent me a pm with very worth while suggestion.

Suspension mounts....?
Grizz were these replaced ? ive been through the invoice parts etc and can't find any mention of them...
I personally would expect the mounts to be replaced as part of a major suspension overhaul?
Not sure I would stand alone on this...
Local Motorsport company haven't looked at the mounts because I had assumed these were replaced. Now I don't know.

I did commission unit20 to replace every suspension component, bushes, mounts, arms.
I was beyond anal about getting my car restored mechanically, and I went all out on the suspension to remove slackness, clunks and rattles - regardless of cost.. No miss communication error on this either as we had that discussion when I found the rear suspension, arms, bushes hadn't been touched after spending 2months without the car. Unit20 did replace the rear arms, bushes etc and was again without the car for over 2months whilst this, the diff and propshaft were replaced as well ( i decided to have it done whilst everything else was off).
To be honest the fecking pss9 suspension setup has been a major disappointment. in simple terms the max ride height and suspension travel isn't enough for the springs to get working properly (basically soak up the bumps of a B road surface - fine if your surrounded by the autobahn). Consequently any cross country driving and you feel every bump through the steering column, chassis and floor. The recommended pss9 ride height created the worse steering wheel feedback, chassis feedback (ie bumps would be absorbed through the chassis and travel through steering column and steering wheel) basically fecking awful. this ride height is about 10mm lower than plus ride height, reverting to max height of pss9 (is about same as plus ride height) - which improved the problem by about 15%. In the end had to take to a Motorsport specialist to tell me what was up, custom springs / with the required spring rates were made for the front only, which have more or less sorted - I would say about 90% - they can't do any more without swapping shocks - basically the bump rebound rates can not be adjusted separately. So I'm stuck. Pss9 was recommended by mrc and unit 20 and seemed to be the way to go according to various forum members. Well it is not in my opinion. I thought I was getting a suspension setup comparative to DRC but stiffer and less body role (inc hotchkins arb). I can't believe nobody has complained about terrible feedback through steering wheel.
Anyway that's a separate issue, the clunking has been there right from DRC days... Feedback through Steering column is result of pss9. I'm not sure if this rattle clunk is the same problem or if its two problems. Anyway, they haven't investigated mounts as I told them everything had been done!
i dont want to have a public spat on a forum, but I'm not a happy chap.

[chunky79]

Top mounts should have been changed when pss9 were fitted, but only if asked to be. MRC changed mine when I had the drc removed, only cause I asked though. I assumed yours had been changed due to all the other work done.
How come you were without the car for so long? Do you work away?

[Shoppinit]

Before you blame the PSS9 for all your woes, perhaps you need to find out where your rattle is and determine whether it's linked to what you are attributing to the shocks / springs.

I have a different experience of them to you. Anyone who's been in the RS6 with me will attest to the fact that I like to hoon down roads that are much more suited to a Scooby than an RS6. I'm talking single track country lanes, frequently with grass growing in the middle.

My steering is lovely and positive, I have absolutely no complaints about that at all.

What I *do* dislike about the PSS9, and what I think you touched on, is that at max ride height, there is not much suspension travel so if you hit a bump or pothole then the springs will compress to their max and the shock will be transmitted through the chassis which is unpleasant and makes my anus cringe. However, to put things in perspective, we are talking about a fairly major road surface defect here - a sudden sharp dip, or change in height of an inch or more.

Maybe you need to drive somebody else's? Perhaps the Hotchkiss are harming your ride - I have standard ARBs.

[Mr Footlong]

I can't believe nobody has complained about terrible feedback through steering wheel.

Erm, you are aware that you are driving something the size of the QEII and not a super nimble point-to-point nuttermobile yes? While I have read what you have been doing to your car on here, some of it really has had me scratching my head tbh. The feedback compared to my other cars is barge-like with and without DRC.

I hope that you get your rattle fixed, but perhaps you should be emailing Grizz instead of potentially calling him out on here? For the record, my top mounts were not auto replaced by MRC either.

[grizz]

The top mounts were replaced on the front .

[Mr V10]

I can't believe nobody has complained about terrible feedback through steering wheel.

It's an Audi. Bar the B7 RS 4, and R8. They're all like that, it was never going to drive as well as your M5, driving a 997 Turbo as a second car won't help with your perceptions on the poor Audi either. Hope the rattle is sorted, I had a rattle in my C5, was a pedal bush or something. MRC fixed it for £40.

[Mr V10]

P.S

Stop spending mega money on the C5, and buy a C6. I'm so gay for mine.

[chunky79]

I can't believe nobody has complained about terrible feedback through steering wheel.

It's an Audi. Bar the B7 RS 4, and R8. They're all like that, it was never going to drive as well as your M5, driving a 997 Turbo as a second car won't help with your perceptions on the poor Audi either. Hope the rattle is sorted, I had a rattle in my C5, was a pedal bush or something. MRC fixed it for £40.

I would pi$$ myself if it was the pedal bush. I really don't think it will be though.