Second time in two weeks. Transmition slam - Page 2

miamigrrl [midori] · 04-09-2002, 07:06 AM

It's happened to me a few times (not in tip mode).

I read somewhere that it's the program in the Transmission Control Module, and there's a fix for this.

do a search for "TCM" or "transmission clunk"

Bollinger · 04-09-2002, 09:02 AM

As far as I understand the fix involved putting massive hesitation into the engine to prevent the slam, not actually fixing the problem. At least that is the impression I got from this board.

In that case, I'll just take care of it myself since I already know how to avoid the slam.

Bollinger · 04-09-2002, 09:04 AM

Choosing first caused the revs to rise, not second.

A thunk is just a small slam, if Audi could fix the thunk they'd have the slam fixed too.

As I said before, and I understand you don't like it, but we are all powerless to do anything about it.

Stoney · 04-09-2002, 12:03 PM

See the following links. The first one is a summary with links that I wrote after reading a number of posts a couple months back. My memory is poor, so I defer to it.

Transmission summary, 2001 A6 2.7T
Tiptronic: Errant Solenoid Valve Seal, and a followup
Description of and testing for 2001 2.7T transmission jerkiness
TCM update for Tiptronics

Stoney · 04-09-2002, 12:17 PM

But, there are two issues, the TCM for the 2001 2.7T, and the solenoid seal.

I'm not well read on them enough to tell which symptoms are which. But, my post above has the necessary links to find out. I hope those that are experiencing symptoms can read them and post again here.

LMGotts · 04-09-2002, 05:41 PM

drhaller · 04-09-2002, 08:58 PM

The link to the message below is from the VAG-COM e-group and for an '01 Passat. I am willing to try anything at this point, the thunk/slam thing is annoying me (and my passengers).

What if the "new" automatic downshift programming has problems with our "coming almost to a stop and then accelerating" use-case scenario? Perhaps by disabling this "new" programming we can "fix" the thunk/slam issue... or at least point fingers at this "new" programming as the cause.

I plan to give this a try on the weekend on my '01 2.7T.

BTW, I checked the current Bentley manual and there is no hint of what the coding values are for "test" purposes. The only valid codings are:

00000 - "coding not valid"
00002 - "for USA/Canada"
00001 - "for rest of world"

As you can see, all the leading digts are 0 in the "documented" valid codings. I wonder what fun one could have with the right documentation :-).

/dan

TCM

04-09-2002, 07:06 AM	#11
miamigrrl [midori] Junior Member Account #: 19039 Join Date: Apr 2001 Posts: 1,750	I thought this was the tell-tale sign that the TCM has to be replaced -> It's happened to me a few times (not in tip mode). I read somewhere that it's the program in the Transmission Control Module, and there's a fix for this. do a search for "TCM" or "transmission clunk" __________________ _______ 2008 A6 4.2 S-line Ibis White/Black (I taught him well) 2008 ML350 Black/Charcoal (gas-chuggin family truckster) 2004 E500 Black/Charcoal (V8 smoothness - gone) 2004 E320 Pewter/Bone (he drives like my granny) 2001 A6 2.7T Ming/Melange (biturbo rush - gone) 1977 Green Machine (totalled - never leave your toys in the driveway!)

04-09-2002, 09:02 AM	#12
Bollinger Elder Member Account #: 502 Join Date: Mar 2000 Posts: 39,985	hmm, is it a "fix" or a fix? As far as I understand the fix involved putting massive hesitation into the engine to prevent the slam, not actually fixing the problem. At least that is the impression I got from this board. In that case, I'll just take care of it myself since I already know how to avoid the slam. __________________ -- "Nonconformity? Oh yeah, you're the first 20 something kid I have seen with a Japanese letter tattooed on his arm. You want to be a nonconformist? Buy a pocket protector and get a haircut. The Chinese kids spending 20 hours at a time in the library are the ones who really don't care what you think about them" - Dr. House (fictional character)

04-09-2002, 09:04 AM	#13
Bollinger Elder Member Account #: 502 Join Date: Mar 2000 Posts: 39,985	I think you mean it chose first Choosing first caused the revs to rise, not second. A thunk is just a small slam, if Audi could fix the thunk they'd have the slam fixed too. As I said before, and I understand you don't like it, but we are all powerless to do anything about it. __________________ -- "Nonconformity? Oh yeah, you're the first 20 something kid I have seen with a Japanese letter tattooed on his arm. You want to be a nonconformist? Buy a pocket protector and get a haircut. The Chinese kids spending 20 hours at a time in the library are the ones who really don't care what you think about them" - Dr. House (fictional character)

04-09-2002, 12:03 PM	#14
Stoney AudiWorld Super User Account #: 230 Join Date: Mar 2000 Posts: 5,270	Summary of TWO Tiptronics flaws: I found my bookmarks See the following links. The first one is a summary with links that I wrote after reading a number of posts a couple months back. My memory is poor, so I defer to it. Transmission summary, 2001 A6 2.7T Tiptronic: Errant Solenoid Valve Seal, and a followup Description of and testing for 2001 2.7T transmission jerkiness TCM update for Tiptronics __________________ A6 (C5 platform) FAQ Stoney's Picture Library Email: jds@sonolithics.RemoveThisPart.com 2001 A6 4.2L, Sport, Premium, Nemo Blue, Melange Interior

04-09-2002, 12:17 PM	#15
Stoney AudiWorld Super User Account #: 230 Join Date: Mar 2000 Posts: 5,270	Hmm, important question. But, there are two issues, the TCM for the 2001 2.7T, and the solenoid seal. I'm not well read on them enough to tell which symptoms are which. But, my post above has the necessary links to find out. I hope those that are experiencing symptoms can read them and post again here. __________________ A6 (C5 platform) FAQ Stoney's Picture Library Email: jds@sonolithics.RemoveThisPart.com 2001 A6 4.2L, Sport, Premium, Nemo Blue, Melange Interior

04-09-2002, 05:41 PM	#16
LMGotts Elder Member Account #: 18003 Join Date: Mar 2001 Posts: 12,852	I see. I grew up in Michigan, and a non-complete stop there was a Texas Stop.... :-)

04-09-2002, 08:58 PM	#17
drhaller AudiWorld Senior Member Account #: 137 Join Date: Mar 2000 Posts: 1,065	Has anyone tried recoding their TCM? The link to the message below is from the VAG-COM e-group and for an '01 Passat. I am willing to try anything at this point, the thunk/slam thing is annoying me (and my passengers). What if the "new" automatic downshift programming has problems with our "coming almost to a stop and then accelerating" use-case scenario? Perhaps by disabling this "new" programming we can "fix" the thunk/slam issue... or at least point fingers at this "new" programming as the cause. I plan to give this a try on the weekend on my '01 2.7T. BTW, I checked the current Bentley manual and there is no hint of what the coding values are for "test" purposes. The only valid codings are: 00000 - "coding not valid" 00002 - "for USA/Canada" 00001 - "for rest of world" As you can see, all the leading digts are 0 in the "documented" valid codings. I wonder what fun one could have with the right documentation :-). /dan TCM

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