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Jerky Gear Change

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20:56
July 30, 2017


Pigbench

Guest

1
0

Hello again

 

I bought my fourth Vel Satis today (not all at once) and I just drove it back from Bristol. It was so fantastic to be behind t he wheel of a Vel Satis again!

 

I'm sorry if this topic has been discussed before but does anyone know why there is such a jerk when you put the car into drive and then go to set off? It's the 3.5L petrol engine. I've never had it to this extent before.

 

Thank you.

10:29
July 31, 2017


dpress

Member

posts 188

2
0

Well done. Was it that nice blue 3.5? As regards the jerk, I don't think anyone has ever given a definitive answer. I am sure I read on this forum somewhere that a member managed to get the 'thump' fixed by having the auto box valve assembly changed. Mine has always done it as well. It is particularly annoying when the clutch has disengaged at traffic lights for instance, and if you then want a quick getaway you can get a real thump as the clutch engages again. I have just had the gearbox oil replaced at 66K and it has made no difference at all.

One trick to lessen the effect, is to move the gearbox into neutral when you first start the car, blip the throttle very slightly and then move to drive. Always keep your foot hard on the brake when placing it into drive, and that also stops it feeling so bad. Once warm and in normal driving mine is generally OK, unless you need to do a quick 3 point turn, and at situations like traffic lights where the box disengages to save fuel, I just try and start to creep before the lights change so that the clutch has engaged at tick over.

I have also found that once the box learns your driving style – if you are smooth and relatively gentle with it, then the gear change and general running of it gets better.

Have fun, dpress

14:02
July 31, 2017


bmn

St.Andrews

Member

posts 152

3
0

Hi there ,I'm the guy that has manage to sort out the jerk/thump with nothing returning after 6 mths.

Two problems can cause this. Firstly check the engine tie bar. This is connect to the bottom of the engine and then  to the body. It stabilises the engine and if worn, as mine was, gives an enormous thump. When I first bought my car it had this thump. When I took it to the main Renault he put the car on his computer,charges me £70 and says my g/box is knackered.  I then took it to my local McConnechy's who discovered the tie bar was worn.No rubber left at all. Replacement slved the problem immediately.  I then got a shunt when taking away from stop. this continued over the years until I tired off it. Despite all the comments on the site that this is just "something we had to live with" I persevered  and discovered it could be down to a worn or sticking hydraulic valve in the box. I took the plunge and purchased a new hydraulic unit from E-bay and had it fitted. Problem solved.  Not only that but I now get 5th.gear in the drive position which is another members complain off.

I have your local garage look at the tie bar and hope that the problem.

Best of Luck,

Brian Cool

20:42
July 31, 2017


Pigbench

Guest

4
0

Hi 

 

Yes it is the blue car off Gumtree – how did you know?! I'll post a pic if I can work out how to do it. 

 

I will try the above fixes using my local garage, that is very helpful indeed.

 

I have just spent a couple of hours cleaning the interior, I wish those sticky surfaces were easier to clean!

 

My other known issues with the car are that the two front tyres are bald on the outside edge only and I tried to get quotes today but the prices were surprisingly high. Also, the drivers electric window doesn't work and there's just a whirring noise (I had this with one of my other cars) and the electric wing mirrors aren't working (not the end of the world). And finally, the radio tunes into every station in the world except Radio 4! Very annoying as I mostly listen to Radio 4.

 

My local garage is going to be busy! Think I will have it serviced too as sadly there's no service history with the car.

 

Christie 

22:01
July 31, 2017


dpress

Member

posts 188

5
0

I always keep an eye on Gumtree for anything interesting…. and that is the only one I have ever seen for sale in Bristol!

I don't know what you class as 'expensive' for tyres, but I bought my last ones from Oponeo online, and had them fitted locally. I have used Nexen tyres for the last 30K+ with no issues, currently a set of Nexen N'Fera SU1 which are £82 each with free delivery, plus of course the cost to fit them locally. I have always had this done by my local dealer and they charge about £20, although you may be able to get it done cheaper at an independent fitter. I thought Oponeo were excellent  - it only took about 3 days for the tyres to come, and it appeared that was from Germany. They do offer tyres as cheap as £68 in the right size/rating, but because I have found Nexens decent , I have stuck with them.

The hydraulic valve box that Brian mentions is on eBay but is quite a lot (~£400) so you may want to live with the clunk for a while. I have previously checked my tie bar mounting (need to take the undertray off to do so) but it was fine – my issue is likely to be the valve body, so I will be living with it.

Enjoy the car – they are great cruisers. I have done 2000 miles in the last 6 weeks all at over 30 mpg, with the best journey just over 550 miles in a day at 35.7mpg, and that was tank to tank refills – the computer said 39 mpg!

 

dpress


 

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