gearboxA2 1.2 tdi

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I just paid £2500 for a repair of the semi automatic gearbox in A2 1.2 tdi Is this gearbox a common known problem??
 
How old is your A2? Sounds a large repair!

Steve - 2002 1.4SE petrol, Silver, black/black interior, Then an identical replacement 2003 A2. Now a Toyota Corolla 1.6 T-Spirit
 
What was wrong with your gearbox?

Mine had a gear selection fault that was cured by replacing the sensors below the gearstick

The Lupo 3L club were very helpful - suggest you email : dennis jørgensen <[email protected]> he is an expert in Denmark for the 1.2 TDI and Lupo 3L

cheers



Lukas

First A2 1.2 TDI in UK
Style pack + Chorus + Advance pack + winter wheels + iRiver MP3CD


http://www.audi-a2.co.uk/mar.htm
 
Our A2 (like most) has an electronic diff lock (EDL) which opens/closes depending on the amount of grip/power you have, its part of the traction control.... as a fail safe unit it sticks open, whereby you can select gear (any gear) release the clutch and nothing will happen, there was no fault reading in the system so Audi removed the gearbox to try it manualy, they found no physical problems with the unit... so in there wisdom put the unit back in to our A2 and nothing happened still no drive through the gearbox... so they ordered a new gearbox.

Beleave this is the first time on an A2 as is more likly to be down to the amount of power you put through the gearbox.

Lee and Sheridan,
TDI SE, Build 11/01, Dolphin Grey
50% Brighter Bulbs : Audi 6 CD Changer : Rear drinks holder : Floppy Wiper : Centre Tray : Elasticated Belt System : Chrome Numberplate Surround : A3 Transmission Nets : Heated Mirrors
 
The Electronic Diff Lock is based on the braking system, not the gearbox. I doubt very much that the system works as described. It just sounds like a knackered gearbox to me.
 
Understand the doubt, however anything using the brakes is either ABS or Traction Control, the ABS is mainly used under braking (agreed), the TC is mainly used under acceleration (agreed), The ASR fills the gap in between...

As I mensiond before out of the A2 the gearbox was in full working order thats why they put it back in...

Also that why its an electronic diff lock, it controls the power through the gearbox to each of the front wheels electronicaly, if one wheel is slipping it will brake it, if its not slipping in will allow more power...

The problem we had is it would not allow any power throught the graebox when it was in the A2.

As as stated before "as a fail safe unit it sticks open" Electronicly open that is.

Lee and Sheridan,
TDI SE, Build 11/01, Dolphin Grey
50% Brighter Bulbs : Audi 6 CD Changer : Rear drinks holder : Floppy Wiper : Centre Tray : Elasticated Belt System : Chrome Numberplate Surround : A3 Transmission Nets : Heated Mirrors
 
Yes Electronic diff lock is a variation of ABS or TCS. It is entirely seperate from the gearbox. It is very similar to traction control except traction control applies both front brakes and reduces throttle, electronic diff lock applies brakes only to the wheel that is slipping. Audi definition is given below:

Electronic Differential Lock (EDL) applies brakes at driven wheels as necessary

As I said this brakes the wheels, not the gearbox. The fundamental principles of a differential, which is part of the gearbox on a front-wheel drive car, means that if one driven wheel spins, all the torque is diverted to that wheel, hence by braking the wheel that is slipping (the EDL) torque is transferred back to the wheel that is not slipping, and hey presto hopefully forward motion will be restored.

If it braked the gearbox the gearbox would need a limited slip differential, and I assure you it does not have one. On Volkswagen/Audi models the only vehicles that have a limited slip device are the AWD models, with Haldex coupling for Golf, A3 etc, and Torsen LSD for A4, A6, A8 etc.

You can't have a failsafe mode on the gearbox where the diff is locked open, because the diff on nearly all cars is open anyway, unless you have a limited slip diff, which 99% of cars don't.

In your case it sounds as if the differential itself was damaged in someway so that power is not getting to the wheels, but this sounds like a very serious manufacturing defect and you should get compensation as well as the gearbox replaced under warranty.
 
I am with adwoodrow - the EDL is nothing to do with the differential as a dealer explained to me when I complained that the one on the Passat wasn't working - it just brakes the spinning wheel. Why you need it with TCS beats me, if the TCS is working you should not be able to spin them!

Ian

2002 1.4 Petrol SE, silver with climate control for SWMBO, Honda Accord Tourer 2.2 iCDTi for me.
 
I hope so, I work for a Management Consultancy specialising in technology applications in the Automotive Industry. Chosen specialised subjects are Vehicle Powertrains, esp. AWD, Vehicle Environmental Performance and Vehicle Lightweighting esp. Aluminium Usage, hence the reason I am driving a very fuel economical, technology advanced lightweight car.

It also drives nice, and looks quite funky.

[8D]
 
All fair points and I stand corrected - Didn't understand it when it was explained to me either, just glad someone here knows what's what...

SO. surly if something breaks in the gearbox it would make a sound (a very horrible sound) which ours didn't, I just changed from 3rd to 4th at 35mph and nothing..add this to the fact that Audi took the gearbox out and could find nothing wrong with it, leads me to beleave that the problem is electronic..

Any how, thank you for putting me right..

Audi did replace the gearbox under warrenty and the new one if far better that the old one (before it stopped)..

Lee and Sheridan,
TDI SE, Build 11/01, Dolphin Grey
50% Brighter Bulbs : Audi 6 CD Changer : Rear drinks holder : Floppy Wiper : Centre Tray : Elasticated Belt System : Chrome Numberplate Surround : A3 Transmission Nets : Heated Mirrors
 
The gearbox would not necessarily make a nasty noise, but at least if it had you would have known it definitely wasn't right!

Its funny how some of the same model gearboxes are much better, or worse than others. I had a Seat Leon hire car in Germany last week, just before I got my new A2. The gearbox on it was absolutely dreadful and I was worried the A2, which has the same gearbox would be as bad, but not the case. I suppose however than when they churn out 1,000,000+ of the same transmission each year some may go wrong.

04 A2 FSI Colour Storm
 
I didn't know the Leon had the same gearbox! It must be able to take some power as the 5-speed Leon gearbox covers a wide range of engines.

Steve - 2002 1.4SE petrol, Silver, black/black interior, Then an identical replacement 2003 A2. Now a Toyota Corolla 1.6 T-Spirit
 
There are actually 3 different manual gearboxes in the A2 if I remember correctly and they are limited by torque rather than power. There is the DS085 automated manual in the A2 3l TDI, MQ200 in petrol and MQ250 in diesel (at least I think so). The Leon also has the MQ200 and MQ250 but the high torque diesels and gasoline models have a six speed MQ350/6.

04 A2 FSI Colour Storm
 
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