gensetsteve wrote:

My diff made a noise and vibration more on overrun. Land Rover fitted a recon diff which got rid of this problem but I now have some noise and vibration on acceleration.

Have you drained the diff oil to see if its black with filelings in it . Have you swapped tyres front to back.

I now drive it and ignor all noises and vibrations unless my sat nav starts falling off the dash. You should enjoy driving these vehicles. If you want a vehicle that is even remotely reliable you may need to look at a Landcruiser or similar

I still don't think you've read my previous posts Not only am I familiar with the differential issues, but I've already replaced front AND rear diffs at dealer on my previous 06 RRS. FWIW the accel noise was more obvious for me afterwards - especially climbing hills, 2nd-3rd gears mod throttle. More of a high pitched whine BUT it was engine RPM-based noise. I think that's normal trans / TC noise.

These vibrations aren't the type of low freq. vibrations that shake anything (like tire vibrations) - it's high frequency, think almost like house fly buzz noise when they fly by your ear..

Again, can't be tire related if I'm getting the exact same noise on two totally different vehicles with 3" different wheel dia. and totally different tires.

lol you don't need to give me the speech about needing a different vehicle.. I drove 500 miles to buy my 1999 Discovery II and I still have it - air suspension and all. Never taken it to a shop once.. I think that says a lot, I've been through quite a bit with that thing. I like keeping my vehicles running the way they were designed to, it gives me a sense of accomplishment every time I fire them up. I hate seeing cars driving down the road held together with duct tape and broken components because the drivers think it's fine since it's still "rolling" and getting them from point a to point b.

I'm not the type to just ignore the noise is what I'm trying to say - plus for curiosity sake I'd like to know what's actually causing the noise and/or failing.

Jumping on stuff like this ASAP when it isn't a huge issue ensures that you don't break down on a road trip with your family or something a few years later.. one thing I've learned early on as a mechanic. Nitpicking every stupid little problem, noise, squeak etc almost always ensures these things are generally running very well.

Disco_Mikey wrote:

I suspect we are talking about different noises/ issues

I tried to record my noise, but it doesn't work.too well.due to all the other noises going on

Nodge68 wrote:

The noise you are describing is exactly what my D3 makes. Accelerating up hills on moderate throttle. Although mine won't be the TC as it's a manual gearbox TDV6. It's some kind of transmission noise from one or more component or a harmonic of the combined noises.

Riccarton Disco wrote:

As an interested watcher may I sumarise.

We "know" it isn't either diff' as these have been changed with no difference occuring.
We "know" it isn't the TC / gearbox as it happens on manuals and autos alike.
We "know" it is road speed based and not rpm based (or have I just dreamt that bit?)
We "know" it is engine load related (throttle position) but not the turbo (see one above).

The last two may be red herrings and turbos (especially VV's) can make some really weird noises until they come under load and this would be my first place to look normally.

Assuming my summary is correct the only remaining item to fit the bill is the Transfer 'Box. Am I right in thinking this is the same on autos and manuals? To some extent this would make sense as the "load" on it would be different depending upon gear selected / speed / throttle position / uphil or downhill and the only time a datum appears is when running light (not on the throttle - not off the throttle).

Anybody tried replicating it on a 4 wheel dyno (not just a set of rollers but one where the load can be adjusted)?

The only fly in this ointment is I had exactly the same problem with a 110 County DC and the supplying dealer changed the Transfer 'Box, Front and rear diffs & prop-shafts. The noise persisted and in the end it beat us all and this is when I upgraded to the D3 which was some smooth it wasn't funny

Disco_Mikey wrote:

Money is still on the turbo

EstorilM wrote:

gensetsteve wrote:

My diff made a noise and vibration more on overrun. Land Rover fitted a recon diff which got rid of this problem but I now have some noise and vibration on acceleration.

Have you drained the diff oil to see if its black with filelings in it . Have you swapped tyres front to back.

I now drive it and ignor all noises and vibrations unless my sat nav starts falling off the dash. You should enjoy driving these vehicles. If you want a vehicle that is even remotely reliable you may need to look at a Landcruiser or similar

I still don't think you've read my previous posts Not only am I familiar with the differential issues, but I've already replaced front AND rear diffs at dealer on my previous 06 RRS. FWIW the accel noise was more obvious for me afterwards - especially climbing hills, 2nd-3rd gears mod throttle. More of a high pitched whine BUT it was engine RPM-based noise. I think that's normal trans / TC noise.

These vibrations aren't the type of low freq. vibrations that shake anything (like tire vibrations) - it's high frequency, think almost like house fly buzz noise when they fly by your ear..

Again, can't be tire related if I'm getting the exact same noise on two totally different vehicles with 3" different wheel dia. and totally different tires.

lol you don't need to give me the speech about needing a different vehicle.. I drove 500 miles to buy my 1999 Discovery II and I still have it - air suspension and all. Never taken it to a shop once.. I think that says a lot, I've been through quite a bit with that thing. I like keeping my vehicles running the way they were designed to, it gives me a sense of accomplishment every time I fire them up. I hate seeing cars driving down the road held together with duct tape and broken components because the drivers think it's fine since it's still "rolling" and getting them from point a to point b.

I'm not the type to just ignore the noise is what I'm trying to say - plus for curiosity sake I'd like to know what's actually causing the noise and/or failing.

Jumping on stuff like this ASAP when it isn't a huge issue ensures that you don't break down on a road trip with your family or something a few years later.. one thing I've learned early on as a mechanic. Nitpicking every stupid little problem, noise, squeak etc almost always ensures these things are generally running very well.