1998 Audi A8 Quattro from Norway - Comments

I have a 1998 A8 with 112,000 miles, and out of nowhere, the tranny messed up. I just started the car and all of a sudden it did not want to accelerate. I brought it to my uncle who works at Audi,and it's reading 3rd gear ratio (sorry about my spelling guys). He said he thinks its just a sensor, but there's no way to find out unless he pulls the tranny out. If anybody has had this problem please post a comment. The car doesent pick up speed untill 40mph; it's basically stuck in third gear. Thanks.

I have read the various issues re: Audi A8 transmission problems and I have one to add to the list.

I own a 1997 A8 with @ 77,000 miles. The car is a gem to drive. Recently, @ 60 MPH and higher, when I take my foot off the accelerator, the RPM drops to @ 1100, then back up to @ 1800, down, and back up again. Usually it is 2X-3X before stabilizing. This does not occur at lower speeds. The other issue is coming to a stop sign or traffic light, it now has a hard downshift @ 3-5 MPH. The Audi dealer servicing the car took a test drive with me and indicated that a new or rebuilt tranmission was needed. His explanation seemed logical. He indicated that with fluid and filter changes, I might get another 4-6 months out of it.

The trade-off is tough as a trade-in would only get me @ $10,000 so spending something for a transmission is still the most cost effective, provided something else doesn't happen.

This particular "Z" transmission. With a re-build will the same issues be evident?

Hi.

Our 1998 A8 was in the shop at about 85k miles for replacement of the timing belt and assorted tensioners/pulleys, before any timing belt problem could occur. It is usually replaced at about 105k miles, but we didn't want to take a chance after hearing some horror stories of engine damage from early belt failures.

The problem now: after reassembly, the engine started leaking oil quite copiously. The (independent) Audi specialist suspected the front seal and replaced it. Oil still leaking. Now he suspects that that model year's 4.2L engine has a peculiar arrangement in that there's a rear seal that gets loosened when the front is opened to get at the timing belt. He thinks he should have changed the rear seal too, and was just unaware of that for a 1998 V8 Quattro (very honest man, close friend; I'm seeking your advice on his suggestion to see what others have seen.)

He will be reopening the engine to get to that rear seal unless someone has a better idea. It's apparently not the head gasket. He's also doing a dye test with an additive to the oil, just to see if there's another clue as to the origin of the leak.

The car has been great, but did need some refurbishment at this stage - has a rebuilt transmission, new power steering pump, new water pump, new timing belt, new front seal, and assorted related consumables. We're hopeful that once this oil leak is fixed it might run trouble free again for some years :-)

Many thanks for any insight you might be able to offer.

Inder

P.S.

Anyone know if the 1998 4.2L Quattro engine is DIFFERENT from 1999, 2000 and so on? How might I get an engine models/revisions history?

When replacing the transmission, make sure you replace the torque converter as well. The problems you are describing regarding over 60 and under 5 mph are typically attributed to the torque converter locking and unlocking.

Bon chance, because many people have problems after they install rebuilt transmissions and make sure you get the appropriate rebuilt. The one I had installed had the serial number removed and now the Audi mechanics are clueless when regarding any help to fix the existing issues. I find it amazing they can't seem to cross reference the VIN number with the type of transmission I need to replace the rebuilt tranny I have now. I work in manufacturing and I know somewhere out there a cross reference exists because of warranty purposes. However, the Audi dealer and Audi of America are of no help to find the information I need. That's exceptionally frustrating for a car that retailed around 65k 8 years ago.

5 grand gets you a nice one of these in the UK now, but while values plummet, maintenance costs do the opposite. You can't run an A8 on the cheap.

I own a 1998 A8 with 107,000 miles which apparently needs a transmission. The car recently (6 months ago) started hunting for gears, shifting from 2nd to fifth rapidly during stop and go traffic, and stuttering when shifting, mostly between 2nd and 3rd gear. I love the way the car drives and am not sure what to do regarding repair.

I was quoted $3,800 for rebuilt transmission. The car is also leaking a small amount of oil with the fix being approx. $800. The trade values I have been quoted are approx. $3,600. Retail on the car, in proper working condition is $7,500 - $9,500. Therefore the repair costs are more than the car is worth!!!

However, that being said, the price of new cars, or low mile pre-owned used cars, are astronomical My A8 has a luxury and size that is hard to replace for $6,000 (i.e. cost of repairs)! What to do?

Hello, Transmissions, transmissions, transmissions. To those of you that have replaced your transmissions here is my story. I'm a Porsche mechanic by trade, 356 version not the new ones. My wife calls me at work one day and says her 98 A8 with 110,00 miles on it will not move when put in gear. I go home and try it and it's locked in gear and won't slip to start off. After a brutal rev and jam into drive I get it to the shop. I change the dirty trans fluid and filter and button it up and it does the same thing, life time fill on trans fluid my ass. Take the trans pan off again and remove the bank of solenoids that do the shifting. Each one has a small filter screen that is CLOGGED with metal! Clean them all out and reassemble and it works like new. Have since driven the car another 90,000 miles and still working like new. When changing fluid drop the pan, do the filter and pull those solenoids. I'm thinking a lot of transmissions are being replaced for no reason other than someone not finding the real problem. A happy A8 owner.

My car is doing the same thing.. could you describe the process for removing the solenoids?

1999 A8 Q 4.2 and just passed 150,000 miles. I have the trans fluid changed every 25,000 miles and just put on my 3rd belt. I have had some quirks with the ABS sensors, which I fixed by removing and cleaning with brake cleaner. I also own an A4 2.8Q just passing 200,000 miles. I don't disagree with problems with the transmission; however, you can't expect to drive the crap out of the car without doing some PM. If you can't do the recommended services, then you should probably stick with a Honda or a Chevy. I make no excuse for the faults of the car, but anyone who purchases one of these wonderful machines, should understand you cannot drive this car cheaply.

I have a 2000 A8 Quatro. When I put the car in reverse it idles back but if I give it any gas the engine just revs and it continues at the same speed that I was idling in reverse at. When the car is in drive it goes through the gears just fine. Does anyone have any thoughts? Also all my digital LCD dash display dim and go out to the point I can't read them. I mean the mileage, date, time, etc are bright and working when I start the car but they continue to get dimmer and within five or ten minutes the LCD's are out or so dim I can't see them. Whats goiung on?

The trans problem is a blown "F" seal and will require a rebuild. The cluster will also require replacement, about $1,500. There is no fix unfortunately.

Bob.

Just purchased an 00 A6 4.2 with 80,200 miles on it. A week after purchase, the transmission started having issues clunking when shifting down into 2 and 1. Also upshift to 3 and 4 is rough. Changed the fluid and still the same.

Bought a warranty for the car for 1000.00.

Changing the oil the other day, I found the pan gasket leaking, so I dropped the pan only to find 1/2 of a valve in the bottom of the pan and the keeper for the valve spring. Quoted 3500 to replace transmission and 4800 to replace driver side cylinder head.

Now in the process of returning the car to the dealer I bought it from. I love the car, but if I would have known the car needed 8000 in repairs, I never would have bought it. =(

I have a 1997 Audi A8 4.2. I was having problems with the tranny, so we bought the tranny service kit from a local euro parts dealer, and let me tell you, what a job we had. I have changed screens in a tranny before, and no where near as much of a headache, wow. But needless to say, I had all of the problems above, but it cost at most 100 dollars to fix. Garages see the Audi and think money off the top.

I have a audi a8 2.8 v6 petrol 1998 yesterday when I put it on drive it wouldent disaply it on the displaying screen, it dosent display none of the gears when I change them like D, P,N, R etc, and I think that when I drive it only goes up to 3rd gear and even if I drive faster it dosent go up on to 4th or 5th gear. and the tiptronic dosent work now aswell becasue of the displaying screen is not displalaing the gears. thanks for all your help.

I have an Audi A8 1999 2.8 with tranny problems. It seems to rev up when it decides to change gear. It is OK if you are going slow with little throttle, but if you open it up, it revs up in middle of changing, then clinks quite badly into gear. Also it has lost a lot of power and seems to be missing slightly.. I have changed the fluid and filter in the tranny.. could this problem possibly be the throttle position sensor? It comes up with no fault codes however on a snap on diag machine, or could it be the solenoids need cleaning out, OR could it be the transmission ECU unit knackered??

Any help welcomed. Thanks for reading.

Rob Wilde.