Whoa! The THUMP! revealed

CalG · 09-06-2008, 12:08 PM

This August issue of Transmission Digest has an article on A8 5HP24, "THE THUMP"

Click the trial button and scroll the pdf document to pages 43 and 44.

The folks at Sonnax are first rate!

The world becomes a smaller friendlier place.

CalG

http://www.transmissiondigest.com/index.htm

tozoM8 · 09-06-2008, 12:29 PM

CalG · 09-06-2008, 12:34 PM

Yes, a quality TC and synthetic ATF

That's the fix according to this article.

Your experience may vary.

Cal

PaulW · 09-06-2008, 01:15 PM

I would say it's spot on. The graphs are very interesting, you can see the total different control logic in the last one as compared to the first one.....it was operating correctly in the last one.

CalG · 09-06-2008, 01:26 PM

Perhaps our mixed results reports after TC replacement is due to fluid and quality issues.

From the cause analysis point of view, We could expect similar improvement with respect to the "hunt" condition as well.

Regards

CalG

PaulW · 09-06-2008, 01:30 PM

Maybe it wears out and doesn't get replaced....and part of the key was getting a proper clutch lining, "stickiness" of material and thickness or "proper clearances".

rangervr4.2 · 09-06-2008, 02:04 PM

Just finished the job this morning. I still smell like transmission fluid.. FWIW, the local Audi dealer (Nalley in Roswell, Ga.) wanted over $250 for the filter and gasket. Thanks to Carson @ Riverside Audi, I got everything for a little over $100.
Phil C

A8CT · 09-06-2008, 04:11 PM

mkurak · 09-06-2008, 04:46 PM

I want to understand, but I'm not transmission savy - oh, and CalG mentioned a TC. Are these the same thing?

PaulW · 09-06-2008, 04:47 PM

If you want to see/try and understand how this works, click the FAQ in my sig and look under transmission.

09-06-2008, 12:08 PM	#1
CalG Junior Member Account #: 69629 Join Date: Feb 2004 Posts: 816	Whoa! The THUMP! revealed This August issue of Transmission Digest has an article on A8 5HP24, "THE THUMP" Click the trial button and scroll the pdf document to pages 43 and 44. The folks at Sonnax are first rate! The world becomes a smaller friendlier place. CalG http://www.transmissiondigest.com/index.htm

09-06-2008, 12:29 PM	#2
tozoM8 AudiWorld Super User Account #: 80919 Join Date: Sep 2004 Posts: 6,174	Did it say synthetic ATF is recommended ? __________________ 02' S8 parting out after engine fire 01' S8 black on black 6 speed manual, RNS-E, Passport SRX 97' graphite pearl A8Q 6MT, S8 brakes-suspension, S8 Recaro seats, cold/warm package, fridge, SR1, Windows XP, custom navigation, heated steering wheel, carbon fiber trim, rearview camera 97' silver on black A8Q SR1 98' black on black A8Q (sold) 94' 100S Wagon (sold)

09-06-2008, 12:34 PM	#3
CalG Junior Member Account #: 69629 Join Date: Feb 2004 Posts: 816	Re: Did it say synthetic ATF is recommended ? Yes, a quality TC and synthetic ATF That's the fix according to this article. Your experience may vary. Cal

09-06-2008, 01:15 PM	#4
PaulW AudiWorld Super User Account #: 22012 Join Date: Jul 2001 Posts: 18,109	Very Interesting Article I would say it's spot on. The graphs are very interesting, you can see the total different control logic in the last one as compared to the first one.....it was operating correctly in the last one. __________________ _________________________________ Paul Waterloo 01 S8 Black on Black Lots of Electronic Mods D2 A8/A8L/S8 FAQ Digest

09-06-2008, 01:26 PM	#5
CalG Junior Member Account #: 69629 Join Date: Feb 2004 Posts: 816	Re: Very Interesting Article Perhaps our mixed results reports after TC replacement is due to fluid and quality issues. From the cause analysis point of view, We could expect similar improvement with respect to the "hunt" condition as well. Regards CalG

09-06-2008, 01:30 PM	#6
PaulW AudiWorld Super User Account #: 22012 Join Date: Jul 2001 Posts: 18,109	Clutch lining material seemed to be an important factor Maybe it wears out and doesn't get replaced....and part of the key was getting a proper clutch lining, "stickiness" of material and thickness or "proper clearances". __________________ _________________________________ Paul Waterloo 01 S8 Black on Black Lots of Electronic Mods D2 A8/A8L/S8 FAQ Digest

09-06-2008, 02:04 PM	#7
rangervr4.2 Member Account #: 75401 Join Date: May 2004 Posts: 291	I'm glad I used Valvoline Maxlife syn when I changed my fluid Just finished the job this morning. I still smell like transmission fluid.. FWIW, the local Audi dealer (Nalley in Roswell, Ga.) wanted over $250 for the filter and gasket. Thanks to Carson @ Riverside Audi, I got everything for a little over $100. Phil C

09-06-2008, 04:11 PM	#8
A8CT AudiWorld Super User Account #: 55607 Join Date: May 2003 Posts: 2,992	you are on a ZF roll ! __________________ 2000 A8, silver/blk, all options integrated phone and garage opener Nav Plus "D" Stock suspension 2000 A8 Blk/Blk, Nav, Xenons

09-06-2008, 04:46 PM	#9
mkurak Member Account #: 134419 Join Date: Sep 2007 Posts: 235	O.K., what's the TCC? I want to understand, but I'm not transmission savy - oh, and CalG mentioned a TC. Are these the same thing? __________________ 99' A Factory Xenons Cold-weather package 17" OEM Schmiederades

09-06-2008, 04:47 PM	#10
PaulW AudiWorld Super User Account #: 22012 Join Date: Jul 2001 Posts: 18,109	TCC = Torque Converter Clutch If you want to see/try and understand how this works, click the FAQ in my sig and look under transmission. __________________ _________________________________ Paul Waterloo 01 S8 Black on Black Lots of Electronic Mods D2 A8/A8L/S8 FAQ Digest

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