D4 SDV6 vibration

**BradC** · 20th March 2020, 03:58 PM

Originally Posted by Eric SDV6SE

Thanks for that, understand now.

No worries. It's one of those really pain in the arse things to pin down. They only way I've done it in the past is with a very reliable mate sitting in the drivers seat with his foot on the brake while I crawl over and under the car with a bit of hose as a stethoscope.

Not it the best from an OH&S standpoint. Haven't had it happen in the disco yet, but probably because mine doesn't have a transmission. In other cars it has generally been something loose on the engine (AC compressor bracket for example) or engine or transmission mounts.

**Discodicky** · 20th March 2020, 04:09 PM

Originally Posted by Barryp

Yes, my 3 litre TDV6 will vibrate slightly if you are applying a small amount of throttle and the auto is hanging onto a relatively high gear, Its at very low RPM probably about 1000 and before it decides to kick down a ratio.
Only lasts for a couple of seconds max.
Probably due to my gentle driving style and the adaptive transmission settings slowing the kick down response.
Regards
Barryp

Mine (MY13 TDV6) also does this on occasions and I put it down to same reason of driving technique.
However I'm sure I once read somewhere of a Service News relating to D4 of trans vibration at around 40kph which involved (from memory) the Dealer fitting an anti vibration mounting at rear of transmission.

**justinc** · 20th March 2020, 06:00 PM

Active mounts can still fail and not show any codes of any kind. They can fail and NOT leak vacuum off. At 198k I would say they are pretty well near end of life.
Also, check all vac lines to and from each one, and their control solenoid....

**Eric SDV6SE** · 20th March 2020, 07:53 PM

Originally Posted by justinc

Active mounts can still fail and not show any codes of any kind. They can fail and NOT leak vacuum off. At 198k I would say they are pretty well near end of life.
Also, check all vac lines to and from each one, and their control solenoid....

Thanks Justin, will check mounts. Vac lines to and from are new, solenoids have been tested and all ok. Id say the mounts are the culprits, how difficult to change out?

**justinc** · 21st March 2020, 04:46 AM

Originally Posted by Eric SDV6SE

Thanks Justin, will check mounts. Vac lines to and from are new, solenoids have been tested and all ok. Id say the mounts are the culprits, how difficult to change out?

🤣 thought someone would ask that... I haven't had to do that particular job on one yet....😊..... thank goodness. There is a fair bit of stuff to remove and poor access. I am not looking forward to my first set 😫

**PerthDisco** · 21st March 2020, 10:21 AM

Originally Posted by justinc

thought someone would ask that... I haven't had to do that particular job on one yet....

..... thank goodness. There is a fair bit of stuff to remove and poor access. I am not looking forward to my first set

Does the 2.7 have the same? First I have ever heard of it

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