Tip acting strange, couple questions

[Schlick]

A couple of times now my brother's 02 B6 1.8T with tip has done this random thing that when you come to a complete stop and then step on the gas to start going again the revs go up to like 3K and the car is creaping and then it slowly starts to go and from there it works fine. That has happened only in regular Drive mode, he hasn't seen it (yet) in Sport or Tip. I have read a bunch of posts about different things going on with the tip, but nothing just like this.

The car hasn't been chipped (to our knowledge) and supposedly has a new tranny, he just got it about 3 weeks ago.


Any thoughts?

As an aside yesterday we were on the freeway and his gas pedal got stuck at wide open throttle, luckly he was able to get it undone before slamming into me!

[zz2h33]

my guess would be something wrong with the TC (torque converter). First question would be why has the trans been replaced already? and two did they replace the TC along with it? Slipping trans and mucked up TC have the same symptoms...so the trans might not have been the problem in the first place, i'm thinking they replaced the trans but cheaped out and put the same broken TC in there. hopefully your bro got a warranty.

in TIP mode, i believe the TC locks up at different engine speeds which would explain why it doesnt happen in TIP.

[Schlick]

my guess would be something wrong with the TC (torque converter). First question would be why has the trans been replaced already? and two did they replace the TC along with it? Slipping trans and mucked up TC have the same symptoms...so the trans might not have been the problem in the first place, i'm thinking they replaced the trans but cheaped out and put the same broken TC in there. hopefully your bro got a warranty.

in TIP mode, i believe the TC locks up at different engine speeds which would explain why it doesnt happen in TIP.

I was thinking the same thing based on what I had read so far. I have no idea why the transmission was replaced, they are talking with the people they bought it from hopefully they can figure something out soon.

The gas pedal sticking still has us puzzled though

[Affinitive]

A torque converter would not cause that unless it was completely ruined in which case you would have a consistant problem and lots of obscene noises. Also very unlikely as these converters don't fail that way. As in completely granading.
What you're describing is a loss of hydraulic pressure. For example, when a forward clutch drum breaks or cracks, they'll do that all the time where you have to rev it like crazy just to get to creep forward a little because it is not able to hold hydraulic pressure.
I would suggest the fluid level gets checked, (though I would still suspect a somewhat more consistant problem), and the pan gets pulled to inspect for excessive debris in the tranny and inspect the filter as well. There could be something wrong with the filter restricting fluid flow intermittantly. Also check for fault codes.

As for the gas peddal thing. Is the actually peddal getting stuck or is it just the engine that keeps reving like crazy????

C

[Schlick]

A torque converter would not cause that unless it was completely ruined in which case you would have a consistant problem and lots of obscene noises. Also very unlikely as these converters don't fail that way. As in completely granading.
What you're describing is a loss of hydraulic pressure. For example, when a forward clutch drum breaks or cracks, they'll do that all the time where you have to rev it like crazy just to get to creep forward a little because it is not able to hold hydraulic pressure.
I would suggest the fluid level gets checked, (though I would still suspect a somewhat more consistant problem), and the pan gets pulled to inspect for excessive debris in the tranny and inspect the filter as well. There could be something wrong with the filter restricting fluid flow intermittantly. Also check for fault codes.

As for the gas peddal thing. Is the actually peddal getting stuck or is it just the engine that keeps reving like crazy????

C

The tranny issue has really only taken place twice, the first time it was 100+ outside and after about 15-20 min on the freeway. The second time it was about 30 min on the freeway and about 80+ outside.

Once you get moving its fine drives totally normal, just that initial off the line that its acting up.

The pedal itself was stuck to the floor, it hasn't happened since, but was definately an experience. He wasn't sure what he did to get to unstick, it just popped up all of the sudden, he was doing several things all at once. Thankfully it popped though, he had his girlfriend and her young son in the car when it happened!

[Affinitive]

No doubt on the peddal thing. I'd probably have to change my shorts afterwards. LOL
It would be prudent to push the peddal by hand very slowly, with the car off obviously, all the way to the floor to make sure it feels nice and smooth. Any binding or "notchy" feeling I would replace it just to be safe. Even though the throttle is "electronic", there are still mechanical components involved.

As for the tranny. I would want to check for faults and find out what exactly was done with the transmission. Did it get a "soft" or a "hard" rebuild. Soft meaning that all the internal seals get replaced and a hard being all or most all internal parts. Most transmission "rebuilds" are "soft" rebuilds with one or two hard parts like a clutch drum or so. Could have a clutch pack acting up. Possibly even a solenoid. Might be prudent to pull the pan to make sure it got the right fluid installed and again check for debris and also look closely to see if any of the solenoids have metal shaving oozing out of them. Though only having acted up twice, it might be too early to come up with conclusive answers.

C

[diagnosticator]

A couple of times now my brother's 02 B6 1.8T with tip has done this random thing that when you come to a complete stop and then step on the gas to start going again the revs go up to like 3K and the car is creaping and then it slowly starts to go and from there it works fine. That has happened only in regular Drive mode, he hasn't seen it (yet) in Sport or Tip. I have read a bunch of posts about different things going on with the tip, but nothing just like this.

The car hasn't been chipped (to our knowledge) and supposedly has a new tranny, he just got it about 3 weeks ago.


Any thoughts?

As an aside yesterday we were on the freeway and his gas pedal got stuck at wide open throttle, luckly he was able to get it undone before slamming into me!

What trans, ZF 5HP19FLA, or CVT? The CVT has several TSBs issued for symptoms like you described.

[Schlick]

What trans, ZF 5HP19FLA, or CVT? The CVT has several TSBs issued for symptoms like you described.

Not sure, is there an easy way to tell? I was under the impression the CVT didn't come with the tiptronic shifter.

[Schlick]

No doubt on the peddal thing. I'd probably have to change my shorts afterwards. LOL
It would be prudent to push the peddal by hand very slowly, with the car off obviously, all the way to the floor to make sure it feels nice and smooth. Any binding or "notchy" feeling I would replace it just to be safe. Even though the throttle is "electronic", there are still mechanical components involved.

As for the tranny. I would want to check for faults and find out what exactly was done with the transmission. Did it get a "soft" or a "hard" rebuild. Soft meaning that all the internal seals get replaced and a hard being all or most all internal parts. Most transmission "rebuilds" are "soft" rebuilds with one or two hard parts like a clutch drum or so. Could have a clutch pack acting up. Possibly even a solenoid. Might be prudent to pull the pan to make sure it got the right fluid installed and again check for debris and also look closely to see if any of the solenoids have metal shaving oozing out of them. Though only having acted up twice, it might be too early to come up with conclusive answers.

C

They took the car back to the place they bought it from (friend of the family) and they are looking into what's up with it but we haven't heard back from them yet. Won't really be able to check anything they finsh checking it out, but thank you for all the advice, hopefully they are able to pin point the issue, they are supposed to just take care of any issues that they find. Fingers crossed!

[nitelyfe]

Gonna hijack my way onto this thread because I'm having similar issues. I suspected fluids as well. Does it make sense that it happens more often if the motor hasn't fully warmed up?

[Schlick]

Gonna hijack my way onto this thread because I'm having similar issues. I suspected fluids as well. Does it make sense that it happens more often if the motor hasn't fully warmed up?

Same here, when the motor is fully warmed up and has been drivin for a sustained amount of time, probably around 20 minutes or that's when it acts up.

[diagnosticator]

Gonna hijack my way onto this thread because I'm having similar issues. I suspected fluids as well. Does it make sense that it happens more often if the motor hasn't fully warmed up?

The temperature dependence can be explained by the expansion of the ATF as it warms up. The fluid level will be higher with the trans at full operating temp. However, temp effects the trans in various other ways, your symptom does not necessarily imply low fluid level in you case. The symptom has other possible causes also. The fluid level should be confirmed anyway. If you do this yourself, follow the specific instructions for the procedure, otherwise the fluid level can't be determined as correct or not

[diagnosticator]

----------------------------------------

Not sure, is there an easy way to tell? I was under the impression the CVT didn't come with the tiptronic shifter.

If the A4 is quattro, then the trans is the 5HP19FLA 5 speed ZF. If it's Frontrack, then it is ----------------------- CVT.

[Schlick]

The temperature dependence can be explained by the expansion of the ATF as it warms up. The fluid level will be higher with the trans at full operating temp. However, temp effects the trans in various other ways, your symptom does not necessarily imply low fluid level in you case. The symptom has other possible causes also. The fluid level should be confirmed anyway. If you do this yourself, follow the specific instructions for the procedure, otherwise the fluid level can't be determined as correct or not

This may be obvious, but I couldn't figure it out looking at the car. Is there a way with out pulling the pan or going under the car to check the ATF? It wasn't listed in the manual, and there was no dead give away after some searching under the hood which was the ATF fluid.

Also to your other question, it is Quattro so it is the ZF tranny.

[nitelyfe]

The temperature dependence can be explained by the expansion of the ATF as it warms up. The fluid level will be higher with the trans at full operating temp. However, temp effects the trans in various other ways, your symptom does not necessarily imply low fluid level in you case. The symptom has other possible causes also. The fluid level should be confirmed anyway. If you do this yourself, follow the specific instructions for the procedure, otherwise the fluid level can't be determined as correct or not

Thanks for the 411. I FREAKIN HATE THE TIP TRANNY! I so wish I would have held out for finding a 6 speed. I don't think I'm alone on that .

Gonna check the fluid level later tonight. I think I remember reading something about it in my owners manual??

[diagnosticator]

In order to check the fluid level and also to add fluid, the car must me on jack stands, and level.
Then, using VAG-COM, access the trans controller, there is a measuring block for fluid temp. With the fluid temp between 35 C and 45 C, engine idling in Park, remove the fill plug using a 17 mm hex tool. With the plug removed, and the fluid between the temps given above, the fluid must drip overflow from the fill port hole. If it does not, add fluid by using a bottle pump,. and a hose with a 1/4" tubing bent in a hook shape to add fluid until it drips overflow. The fluid temp MUST NOT exceed 45 C before the dripping overflow is achieved. Replace the fill port plug BEFORE turning the engine off!

[nitelyfe]

In order to check the fluid level and also to add fluid, the car must me on jack stands, and level.
Then, using VAG-COM, access the trans controller, there is a measuring block for fluid temp. With the fluid temp between 35 C and 45 C, engine idling in Park, remove the fill plug using a 17 mm hex tool. With the plug removed, and the fluid between the temps given above, the fluid must drip overflow from the fill port hole. If it does not, add fluid by using a bottle pump,. and a hose with a 1/4" tubing bent in a hook shape to add fluid until it drips overflow. The fluid temp MUST NOT exceed 45 C before the dripping overflow is achieved. Replace the fill port plug BEFORE turning the engine off!

Impressive knowledge sharing. Thanks. I think I might leave this one to my local shop.

[Schlick]

In order to check the fluid level and also to add fluid, the car must me on jack stands, and level.
Then, using VAG-COM, access the trans controller, there is a measuring block for fluid temp. With the fluid temp between 35 C and 45 C, engine idling in Park, remove the fill plug using a 17 mm hex tool. With the plug removed, and the fluid between the temps given above, the fluid must drip overflow from the fill port hole. If it does not, add fluid by using a bottle pump,. and a hose with a 1/4" tubing bent in a hook shape to add fluid until it drips overflow. The fluid temp MUST NOT exceed 45 C before the dripping overflow is achieved. Replace the fill port plug BEFORE turning the engine off!

Couldn't be any easier huh? WTF were they thinking!

[AudiOso]

I have the Tip in my Avant and have had no problems at all with it. From what I know about them they're pretty solid gearboxes. The 1.8T is kinda slow since you can't spool up boost like you can with a clutch, but other than that I find the driveability to be just fine.

[diagnosticator]

Couldn't be any easier huh? WTF were they thinking!

ZF says the fluid is a "Life Time Fill"**, and unless there are fluid leaks evident, there is no need for a dipstick. Having said that, it's a PIA for sure, but the method specified and the hardware configuration, provides for a very accurate fluid fill level.


**That is the case from ZF's perspective, but if maximum performance and extended reliable service are desired, then changing the fluid and filter every ~ 40K miles, is recommended.

BTW, my interpretation of "Life Time Fill", is "Until the transmission fails" as a practical matter.

[Schlick]

The car went back to the shop that originally did the transmission and they found the "right rear solenoid" to be bad. They are going to do more road tests on the car but they said all seems well.

[nitelyfe]

The car went back to the shop that originally did the transmission and they found the "right rear solenoid" to be bad. They are going to do more road tests on the car but they said all seems well.

How much was the repair?