MartinDower Posted September 11, 2004 Report Share Posted September 11, 2004 If the car sits in 5th for a while, like on a motorway. Say for 30 mins or more when I kick-down the car shunts quite violently into 4th in about 10% of occasions. Any ideas? Link to comment Share on other sites More sharing options...
Sven Posted September 11, 2004 Report Share Posted September 11, 2004 Hmm, first step would be the transmission fluid change. Have you done that yet? If not, get it done ASAP. May save you expensive repairs later on. See how to on Audipages.com Link to comment Share on other sites More sharing options...
MartinDower Posted September 12, 2004 Author Report Share Posted September 12, 2004 Thanks Sven. Car was only serviced (by a vert reputable independant) 3k miles ago but I will pop it into a pukka dealer to have a check Link to comment Share on other sites More sharing options...
SneakyMcC Posted September 12, 2004 Report Share Posted September 12, 2004 I think Sven will tell you that some of these g/boxes are sealed for life and have an oil that s'posed to go the dist. As Sven says, wont hurt to change it. I'm sure I read PW's (audipages) post where he's said sometimes they need the oil changed twice (flushing) and that can sort'em? G'luck! Link to comment Share on other sites More sharing options...
Sven Posted September 12, 2004 Report Share Posted September 12, 2004 Yeah, that's right. Dealers won't do this unless you specifically ask. In fact they may try to convince you it doesn't need to be done. But just look at the page behind the link, and you'll see why it may be wise to get this done... Link to comment Share on other sites More sharing options...
AnArtist1 Posted September 13, 2004 Report Share Posted September 13, 2004 This is exactly what my beast is doing. Savage clunk then eventually a gear change!! I had my Auto transmisson fluid changed (under warranty, thank god) result was excellent, super smooth, but on long motorway journeys it re-emerged but not quite as savage. I have told my stealer this and they are going to do extensive tests (thrash it about a bit as they usually do!!!) they have mentioned a 'new gearbox' if they can't solve it. I shall keep you informed. Link to comment Share on other sites More sharing options...
Sven Posted September 13, 2004 Report Share Posted September 13, 2004 Don't want to jinx anything but just in case anyone may need it: They offer a rebuilt one on eBay, object nr: 7919728681 Price ~ €2000 or € 2200 buy now. Link to comment Share on other sites More sharing options...
audia8s2 Posted September 14, 2004 Report Share Posted September 14, 2004 Could be a bit of slack in the Prop shaft/ rear diff......... Link to comment Share on other sites More sharing options...
AnArtist1 Posted September 14, 2004 Report Share Posted September 14, 2004 I have had 2 dealers inspect my Prop shaft/rear diff and tell me they are fine. Even though they have experienced the 'shunt' in question Is it an easy task for mechanics to check? or is there a bit of collective lying going around?!? Even though I keep going back with the same problem it has to be down to 3 things: a. Prop shaft b. rear diff c. Gear box I just want my little broom broom to work properly!!! Link to comment Share on other sites More sharing options...
MartinDower Posted September 14, 2004 Author Report Share Posted September 14, 2004 I suspect it is gearbox related as on mine it only occurs when going from 5th to 4th. The relatively higher torque generated in lower gears would make the problem worse in 3/2 4/3 than in 5/4. Suspect it is a lazy change caused by the car being it one gear (5th) for such a long time. I will request the oil change and hope it clears up. Link to comment Share on other sites More sharing options...
PaulW Posted September 14, 2004 Report Share Posted September 14, 2004 Try turning on the ignition, press the gas pedal to the floor slowly over a 20 second period, hold it for 5 seconds and slowly release it. See if that makes a difference. It adapts the throttle potentiometer I believe. pw Link to comment Share on other sites More sharing options...
MartinDower Posted September 14, 2004 Author Report Share Posted September 14, 2004 OK, I'll give it a try....and report back I assume you mean the TPS (throttle position sensor) when you say throttle pot? Link to comment Share on other sites More sharing options...
Fingers Posted September 14, 2004 Report Share Posted September 14, 2004 As all the resident transmission experts are gathered here, a quick q... I gather the transmission 'learns' how you drive it - as someone else put the first 60k on the clock, is it possible to 'reset' the box and start it learning again? I get similar symptons as Martin, but only at low 'coasting' speeds, and wondered if this could help? Link to comment Share on other sites More sharing options...
peterb Posted September 14, 2004 Report Share Posted September 14, 2004 I don't think its memory is that long. I believe it learns over minutes, rather than years. Link to comment Share on other sites More sharing options...
Fingers Posted September 14, 2004 Report Share Posted September 14, 2004 Ah. I'll get the oil changed then... Link to comment Share on other sites More sharing options...
MartinDower Posted September 15, 2004 Author Report Share Posted September 15, 2004 [ QUOTE ] Try turning on the ignition, press the gas pedal to the floor slowly over a 20 second period, hold it for 5 seconds and slowly release it. See if that makes a difference. It adapts the throttle potentiometer I believe. pw [/ QUOTE ] Well.....I tried the TPS reset and although I have only done 50 miles since then the shifting seems much smoother, both up/down in tippy and full auto mode. Need to give it a run but it was markedly better. How often do you need to reset this? Link to comment Share on other sites More sharing options...
PaulW Posted September 15, 2004 Report Share Posted September 15, 2004 I'm not quite sure, still haven't found when to do it in the manual.....I would think after the memory was erased, maybe when the battery is disconnected? Somebody posted it on the audiworld A8 forum and we have found it to make the trannies a lot smoother.....but it's so expensive and hard to do!!! Link to comment Share on other sites More sharing options...
AnArtist1 Posted September 15, 2004 Report Share Posted September 15, 2004 Mine did exactly the same after TPS reset... a lot smoother. But I have not had a chance to test it on the motorway yet. This i shall do on Tuesday when I travel all the way back to the dealers to get a new passenger seat belt and a suspension arm replaced ...... and what ever else falls off on the way!! Link to comment Share on other sites More sharing options...
Sven Posted September 15, 2004 Report Share Posted September 15, 2004 Yeah, as I said before, when you disconnect the battery at least 15 minutes it resets to the basic setting. From that the learning mode goes quicker. Takes still a bit of driving tho. Dealer says ~250 km for complete adaptation. I don't like the basic setting, but if it helps... Mine was getting more and more to my linking after the Euro trip. Now it shifts very quick and smooth, but I do keep it in shape with Tip (use that a lot), and when in auto I don't hang about either. That helps to keep it alert. Note: think about the radio code when you disconnect the battery! Link to comment Share on other sites More sharing options...
A8Mark Posted September 17, 2004 Report Share Posted September 17, 2004 [ QUOTE ] Try turning on the ignition, press the gas pedal to the floor slowly over a 20 second period, hold it for 5 seconds and slowly release it. See if that makes a difference. [/ QUOTE ] I had a prob with the gearbox constantly changing gear while u were driving up hills etc.... But since i did this the probs fixed and its smooth gear changes for me now.... Nice one PW.... A8Mark... Link to comment Share on other sites More sharing options...
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