Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26701
|
| Shuddering on acceleration. |
|
Drove back from Scotland overnight last night, towing 1900kg caravan, and a full load in the boot.
Each time I accelerated from a standstill, when the car changed to 3rd gear she started a very noticable shudder. It lasted about 5 - 10 seconds then completely disappeared with the next gearchange. More throttle makes it worse. If it were a manual, I would swear it was a slipping clutch, but she is definitly an auto.
Also, noticed that the revs are not stable when cruising. With CC on, at 60mph the revs are fluctuating by about + - 50rpm. I must add that this was 5th gear, as it would not hold 6th with all the weight and a head wind.
When I accelerate at higher speeds, the revs increase in jumps rather than smoothly.
It may be normal, but I have not noticed this before in 84000 miles. I don't think the juddering is normal though, and it got worse as the journey progressed. Without the caravan, it is still there but not nearly as bad.
Any ideas?
|
 1st Sep 2007 10:51 pm |
|
|
bkehoe
Member Since: 25 Feb 2006
Location: Wexford
Posts: 1481
  
|
Gareth, can't help with the juddering problem, but I think it's perfectly normal for the RPM to fluctuate slightly when set on cruise control (and even when driving manually with it in a fixed gear); at least mine does anyway depending on how much power it needs from the engine to maintain the speed. If it overdoes it and overshoots the speed a bit (e.g. after cresting a hill, or even a slight rise in the road), it'll back off on the power and then go back on. Even the wind outside can cause this, e.g. a gust of headwind and it'll put on more power. IE - 05 D3 TDV6 HSE - Zambezi Silver
SA - 07 VW Golf TDI - White - Sold!
|
| 2nd Sep 2007 10:17 am |
|
|
Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26701
|
I hear what you say Brendan, and I am sure that its difficult for the electronics to establish an equilibrium so that everything stays the same constant speed. I maybe just never noticed it before.
|
| 2nd Sep 2007 10:42 am |
|
|
dave-rsvr
Member Since: 04 Sep 2007
Location: beds
Posts: 134
|
i towed a bike trailer with mine today(done 20000 miles )noticed that when i got to 70(controlled private road of course) that there was a vibrating noise/felling did it all the way there and back which was about 130 miles does not vibrate when driving without trailer and trailer was fine on old car
|
| 10th Sep 2007 9:05 pm |
|
|
DaveT
Member Since: 01 Aug 2005
Location: Cornwall
Posts: 2572
 
|
Try googling Torque converter shudder.
The results don't look very encouraging  Long succession of Disco's since 2001...
SIII Lightweight - neglected & rusting. Bulkhead, A panels, vent panel & outriggers now disintegrated - Next years project!
|
| 10th Sep 2007 11:04 pm |
|
|
