Allroad 2002 2.5TDI Quattro AUTO TRANSMISSION Question

[Tel2]

I ran all day yesterday with the MAF disconnected. To start it seemed to stop the gear changing problem but later it came back so I am not really sure whether it had any effect. I can see that it is worth trying to clean the MAF so I'll get some cleaner and do it. With the problem being intermittent and not necessarily easy to reproduce the improvement yesterday morning may just have been that the fault wasn't present on that journey. I will continue to run today with the MAF disconnected as it doesn't seem to change the way the engine performs but I fear that the gearbox issue is not related to the MAF.

[Tel2]

Hi, There should be no harm in putting a good quality fully synthetic oil (closer to 5w30) to ease off the idle speed of the engine immediately after a cold start in the morning. In A6 ALLROAD, the system set gear change intervals are pre set at around 0-5mph for 1st gear; 6- 15 for 2nd gear but if you're going uphill it will hold until you reach 20mph. The 3rd gear should be switched automatically at 21mph; 4th gear at 31mph and the 5th gear at 41mph unless you choose to switch the gear in manual mode. In both modes the gear change intervals will remain nearly the same. The very Common Mistake is when the driver start over riding the gear change from the button at the steering wheel while the car is being driven in AUTOMATIC. This can lead to the fault code suggesting a problem with the "gear range/interval".

Thanks for the comments. When the gearbox is being particularly difficult you can get to 30mph in 1st gear and it still won't change, you have to do it manually. There are no buttons on the steering wheel so the gearbox has never been overridden. The fault code has only come up once and since clearing it 2-3 months ago it has never come back.

The most regular symptom is that the engine will rev to 4-5K between gear changes as the change is very slow while the gearbox thinks what to do next.

[Tel2]

I have opened this question again because after the problem went away almost entirely for the summer, it is now back with a vengeance. My wife told me that when she was driving yesterday, all the auto transmission lights on the dashboard were on, she couldn't even change gear manually and it seemed to be stuck in a single gear but she couldn't tell which. On the way back it was fine again! I drive it this morning and had little problem. A couple of times the auto box changed down for a hill with a bit of a thump and then revved somewhat when changing back up but this was only in the first couple of miles.

I checked for any codes when I got back and did find one this time, a new one: 17119. This code is not listed my Vagscanner manual but searching the web it seems to be the following:

17119/P0735/001845 - Gear 5: Incorrect Ratio

Possible Symptoms

• Clutch Slipping
• Reduced Power Output

Possible Causes

• Gear related Clutch slipping/faulty
• Gear related Solenoid Valve dirty/faulty
• Overloaded Clutch due to continuous high Torque or Tuning
• Wiring and/or Connections faulty
• Sensor Gear Position Indicator faulty
• Mechanical Failure

This would make sense and is probably a connections fault but how do I find where that would be?

There is no doubt whatever this problem is it is totally temperature dependent. During the warm weather it does not appear and when colder it only appear when the engine is cold, drive a few miles and the problem usually goes away. As previously stated I have had auto specialists look at it as well as the local mechanics and all are baffled. Does anyone have any ideas?

[abby1]

check for a wet ecu below drivers seat underneth carpet may feel dry on top but lift it as ecu sits in low part off floor

[rowdy-999]

Not sure why you're being advised to change engine oil when you have a gearbox problem?

You're gearbox oil is thickest and therefore at highest pressure when cold. It could be a faulty oil seal or valvebody losing fluid pressure.

[les cocker]

Hi
I am running a 2005 Allroad 2.5 tdi with quatro box and 149k on the clock I have been having issues with gear selection and change up times. Some times on start up when i select R I get a loud clunk and the car steps back with a jerk. I then select D the same noise and jerk happens. At the same time the PRNDS is blanked out and tip 12345 is locked out . If i drive the car it stays in 1st gear or at least thats what it feels like. if i stop and start the engine ( some times 3 or 4 times ) the fault clears and the car drives better but still with the following issues I have had the car for 6 months and the problem is getting worse.
When driving under what seems to be normal gear selection the engine revs quite often go to 3500 before it will change up, this happens even at very light throttle application and on flat level ground. I have today drained the transmission and changed the filter and sump pan gasket ( awaiting new oil from Audi Teesside ) but I only got about 5 ltr of oil out (audi said 9 required) has any one got any tips on how to get more out as the oil is not as black as engine oil but not far off and i would like to get rid of any grubby stiff before i fill again, and also
where can i check the oil temp that was refered to in a post about a 3.2 tt quatro box I have a temp probe for a fluke multimeter that i intend to use I installed vcds on my laptop but am waiting for a cable I am trying not to let this get out of hand as i had a A6 se 2000my that stared acting strange and then lost all drive and dumped oil all along the motorway 2700£ for a new box fitted
Just done the oils and filter, its a bit smoother to drive but still got the shift lights locking out which as you say clears if you switch off and on some times twice
I saw some thing on youtube relating to a selector switch on the side of the box whisc can cause trouble but have lost the link If i find it again i will post it



This week 2 months after i started on this issue I hav taken the leap and had the car into Audi Teesside (Part of the Benfield motor group) They checked on a diagnostic and came back with Immplausable selector switch position This has now been changed at the cost of £727.79 I collected the car at 1700 today and drove the 40 miles home over the North York moors up hill and down dale. The box performed faultlessly and was changing up at around 1900/2200 rpm with 60 mph at 1900 and 70 mph at 2300 I was fortunate when i got to the dealer as a mate form my rallying days is working there and he did the job. I got a blow by blow of the work done and i am confident this has cured the beast

[Tel2]

check for a wet ecu below drivers seat underneth carpet may feel dry on top but lift it as ecu sits in low part off floor

Thanks for the suggestion about a wet ecu. I have been all round the area beneath the driver's seat and can't find how to get under the carpet. It appears to be a single piece of carpet cover the whole floor area and up the side of the transmission, rear seat and outer sills. It feels perfectly dry on the top, as you mentioned, but I can't feel underneath it. Is there a knack to getting below the carpet?

[abby1]

kick panel see a wee square below that is a screw undo remove panel then with a flat bladed screw driver lift panel along the top off carpet to door jamb push seat all the way back then lift carpet and feel for damp ecu is in black plastic box should be able to slide to you

[les cocker]

Is this where the gearbox ecu lives ??
I have done the left side which had water in the tupper ware box but no in the ecu which had been opened before so easy to access
Box had seemed to have settled but today it locked in 1st again. Nocked into.N switched off restarted and hey presto good to go did it on the run as i have 500 yds clear road to go at ��

[Tel2]

I am sorry, I am getting confused with the multiple threads here. Is the the ecu under the driver's seat on a right hand drive car or is it under the passenger seat on the left side of the car?