[Phil]

I have just had a quick look through this site so sorry if this has already been discussed, but could'nt find anything.
I have a 2.0 tdi dsg 57 plate Eos from new and when moving away from rest the car jerks forward. This is always the case unless you pull away really really slowly. I was just wondering if anyone else is finding the same experience. I am not interested in pulling away quickly but it's not easy to drive the car smoothly from stand still. This is the first diesel auto Iv'e had and am wondering if this is the norm or is it because of the dsg. ( previous petrol auto's were fine ) I did'nt test drive an Eos before I ordered but did drive a diesel Golf with dsg and although it was slightly hesitent on pull away I recall it being a lot smoother.

 

[bneeos]

The only time mine jerks is when I quickly move it into D from neutral and take off, otherwise the TDI-DSG is smooth.

 

[SiJ2000]

Its a powerful torque... The clutch disengages very quickly on the DSG... Also, as said above, don't put in drive and then speed off within a milisecond! Let the gear engage!

Also, take foot off the brake and wait for quarter of a second! It will also jerk if you take foot off brake and accelerate before clutch engages!

 

[Lopaka]

DSG, does not like Stop & Go traffic

Aloha from Hawaii,
Sorry to say, they all do that. I have the 2.0T 200hp, you just got to give it time to engage, then go easy on the gas. Power is instant for there is no torque converter. It is a manual transmission with a computer controlling 2 clutches.
Mahalo,
Lopaka

 

[SKIDOO]

Aloha from Hawaii,
Sorry to say, they all do that. I have the 2.0T 200hp, you just got to give it time to engage, then go easy on the gas. Power is instant for there is no torque converter. It is a manual transmission with a computer controlling 2 clutches.
Mahalo,
Lopaka

Lopaka, off the subject completely but on our tv news last night it showed pics of the lava flow from Big Island, just wanted to check that all was ok where you are and would be interested to know if and how the eruption might be affecting your area?
Gary

 

[Lopaka]

Lava Flow

Hey Gary,
I live on the Island of Oahu, so what we get is called Vog. Just like smog.
Lots of sulffer in the air. Been in the upper 80s with Sunny skys.
Take care,
Lopaka

 

[Phil]

Thanks to all who replied with your advice. As suggested this would appear to be normal, however just in case mine is perhaps a bit worse than others I will have VW check it out when in for service very soon

 

[HappyFunBoater]

I'm also a little jerky pulling away from a stop, especially on a turn, but it's because I'm fighting to stay in the zone between not moving at all and squeeling the front tires. I've got about 3500 miles on the car and thought that it might stop when the tires broke in, but it seems about the same. I don't squeel as much anymore, but I think that's only due to me being more carefully with the gas peddle. I still end up squeeling the tires every few days, and it's embarrassing. I considered starting off in second gear, but that sure seems like a lot of extra effort for something that shouldn't be happening.

So is this normal, or is it something that should be looked at when I take in the car for it's first oil change?

BTW, I have the 2.0T with 17" stock tires.

 

[Mercilessswine]

As stated in previous posts the dsg gearbox is essentially 2 gearboxes controlled by an ecu. If you are stationary and select neutral the ecu wont know if you want to go forwards or backwards so it will preselect 2nd and reverse. If you then pop it in drive and attempt to move off it will move off slowly in second while it selects 1st then will jerk into first and 'launch'. However if it is in drive it preselects 1st and 2nd so the take off is much smoother. So with that in mind either pause a second before pulling away or have it in drive.

Some dsg boxes do suffer greater lurching or hunting from a stop so if yours is excessive see your dealer it may need a basic setting carried out or possibly a software update .

 

[Skipper Don]

I have a 2008 gas model and have the same problem.
Check this link for a good explaination of the fix which I have my dealer working on at the present, http://forums.vwvortex.com/zerothread?id=4072270

 

[dct82me]

Jerking movement

I posted the following message in the thread that
Skipper Don speaks of above:

cjboffoli:

THANK YOU immensely for this very informative post. I discovered
the jerking movement about one month ago, and it progressively
got worse. At one point I got "stuck" in my driveway wherein my
car would lurch forward up my slightly-inclined driveway and then
roll backward, then proceed forward again, then roll back. I looked
around to see if anyone in my community was watching me. I seriously
felt like I was on Candid Camera.

Anyhow, I dropped my car off at the dealer today. I printed up your
email, and I let the head mechanic/service advisor read it after my
accompanying him on the test drive. We got in my car, and I directed
him to take the car outta Park, then remove his foot from the brake.
My car immediately "hopped" forward. He was utterly amazed. He
said he'd never seen anything like this before. I then directed him to
accelerate, and we jerkingly proceeded forward. I explained it as a
"learning how to drive stickshift" resemblance. He said he was going to
contact VW of America. He then said he'd "flash" the system first (or
something to that effect). I've been lent an '09 Rabbit as a courtesy
car (certainly not the same, but will do). I'm looking forward to seeing
what they have to say tomorrow. I was just very happy that the car
replicated what I had been dealing with on the test drive.

I'll follow up with another message when I find out more.

P.S. - I have an '08 that I purchased in Sept. '07; 11,400 mi.

 

[jamesyboy5593]

Mine also jurks forward sharply, but only when I have it in sport mode and floor it off the lights!! Not much arount that'll will beat it from a stand still, which is great as my black Eos with Westwoods looks quite conservative (intentional).

Cool.

 

[dct82me]

I was informed that some new electronic components
were being ordered and shipped from Germany. When
I asked the service advisor for more detail, he indicated
a new valve body has been ordered and is being
shipped. I have no idea what a valve body is/does. Does
anyone have any insight?

 

[silvershadow]

I was informed that some new electronic components
were being ordered and shipped from Germany. When
I asked the service advisor for more detail, he indicated
a new valve body has been ordered and is being
shipped. I have no idea what a valve body is/does. Does
anyone have any insight?

The DSG gearbox uses a hydraulic system based on pressurised fluid to activate the clutch packs and, I assume, the preselection of the gears [have not had time to read up on the technicalities yet ]. For this system to operate, there has to be a way of starting, stopping and directing the flow of pressurised fluid to make the gearbox function.

This control is undertaken by specially designed valves which are simply an exterior housing with various passageways for the fluid and a central cavity [bore] which contains a moveable piston. This piston opens and closes a series of openings in the cavity to make the fluid flow/not flow in the desired directions. The piston may be actuated mechanically or by electronics depending on the design.

The main service problems with this type of system involve wear, mechanical damage to the finely machined surfaces of the piston/bore and jamming of the piston by foreign bodies carried in by contaminated oil.

I suspect your problem may be damage to the piston/piston bore from foreign objects [swarf/grinding dust from manufacture of the components which had not been fully removed before assembly at the factory] alternatively muck carried into the system by contaminated oil causing the piston to stick. This sticking and consequent abrupt opening/closing of the valve could be the cause of the jerky starts. The rectification required involves draining the transmission fluid and flushing the system, replacing the parts, flushing again before refilling and testing the transmission. A hydraulic service technician can almost do this work with their eyes closed as it is an everyday occurrence . Cleanliness is the number 1 priority with hydraulic systems due to the very fine tolerances that apply to the components. I spent part of my working life selling, demonstrating and trouble-shooting hydraulic mining and construction equipment and this was a responsibility that gave me a lot of job satisfaction.

If you would like to explore basic hydraulics further, the following link is a good starting point and includes a comprehensive description of control valves:

http://en.wikipedia.org/wiki/Hydraulic_machinery

 

[dct82me]

Thanks for the insight, silvershadow.

 

[dct82me]

She's back!

I got my car back yesterday - yea!! Felt nice to have
the power again (courtesy car was a Rabbit - yawn).

So here's what is written in the R.O. (exactly as written)
as far as what was found:

"FOUND MECHATRONIC DEFECTIV AFTER GFF 3.00 REPLACE
MECHATRONIC UNIT AS PER CHRIS AT WOF HELP LINE AND
ALL THE BOLTS AND SET BASIC SETINGS OF THE DSG TRANS
AND CODE CONTROL MODUAL AND ROAD TEST FOR 65 MILES
AND WORKING TO FACTORY SPECES"

There was also mention of a "softwear" update (apparently
there was a recall).

 

[dct82me]

UPDATE - ugh!!

UPDATE: After getting the Mechatronics Unit replaced in October, my
car was running smoothly. Fastforward to three weeks ago -- I started
hearing a "vibrating noise" and another "rubbing" noise. The "vibrating"
noise just sounded like a, well, vibrating noise under the hood. The
"rubbing" noise, as best as I could describe to the head mechanic,
is the sound that one hears when you drift off to the side of the highway
and you hear those "grooves" that the Department of Transportation (or
whoever) has put there to wake up those that have fallen asleep at
the wheel. I had the head mechanic take a test drive with me, and he
heard them as well. I left my car on the 27th b/c my bday was the 29th
and I was not gonna be in town. I got a call last week stating that they
had contacted VW of America, and it was suggested my transmission
be replaced . So now I'm waiting for the transmission to be
shipped and installed. I hope everything will be rectified after this
next step. My car turned 1 year old in September, and in October it
started with problems . Wish me luck!!

 

[walkert]

I'm worried too!

I purchased my 08 EOS in June 08 and I have recently encountered only what I can desicribe as sudden jerks when first accelerating. Now this is NOT the lag time, this is after the car starts to move slowly, it jerks drastically. Another way of explaining it is "bunny hopping" after movement has started. It does not matter how slow you try to pull away in either dirve or reverse. I also have been noticing it does it now while in drive pulling away from a complete stop. UGH. I'm afraid that I have the same issues with the Transmission that you are having. I am getting ready to schedule maintenance for this issue. I hope they do not keep it long - it just started getting great weather!

T

 

[dct82me]

Walkert:

Get it checked out. I had my transmission replaced a few months
back due to reasons stated above, and the drive is sooo much
sweeter . I'm reeeeally lovin' my car now!!

 

[Barry C.]

Jerking DSG Transmission

Notwithstanding that some of the above threads have got DSG Transmission faults, one must consider also that the DSG transmission is very direct and has not got the snatch free characteristics as a conventional transmission with a torque converter, that many of us are used to. It may be of interest (according to what I have read) to appreciate that the DSG clutch has a couple of "bite" positions, influenced by the lightest application of the foot brake. When stationary with the FOOT BRAKE applied, the clutch is almost totally free (disengaged). However, release the foot brake and a signal is sent to the clutch to engage to the first "bite" position and the car will start to creep after a second or so (the time the clutch needs to take up the first "bite" position). Should the hand brake be applied and the foot brake released it is noticeable that the engine attempts to overcome the hand brake, as the clutch has now assumed first bite position and the hand brake has no influence over the clutch. Therefore if the foot brake is released half a second or so before hitting the gas, the clutch will be half engaged (first bite) and a smooth take off will result.

It's also therefore advisable not to sit in traffic in gear with the hand brake applied as the clutch will be partially engaged. Use the footbrake and the clutch will be almost fully disengaged. Further information on this subject can be found in this forum under DSG Gearboxes.

I am not a technical person, but a little bit of understanding on how the thing works can often improve the driving experience.

NB: Perhaps the DSG Gearbox of the future would be better with two torque converters instead of clutches..........