Name that problem! (I think TC)

[Brav]

While on the way to ferry one car to a shop with my sister in tow in the RS6, she told me the car was acting funny, and not shifting right. I thought she had it stuck in manual mode. Sure as sh*t, it was slipping bad. PRDLS was all red. Shut it off, went away. Then it slipped bad a few times and got the CEL. If I drove very slowly, it would not slip too bad and would eventually get to highway speed and got her home.

Here are the codes.. . but to me it seems it could be a bad sensor or ground. Ever since I replaced my alternator, batt light has been on but charging and running fine. The low voltage to the ABS module may be a clue. "Incorrect Gear Ratio" is clearly evident of the slippage. I have had the "Gear Recognition Signal" come and go throughout the life of the car, but never an issue about it. Never seen the "load signal" error.

As for the MAFs - they are new, and it does this sometime after going WOT. Not a concern for now.

SO - cast your vote:
Voltage/ground issue
Sensor issue
TC toast, time for ACE


Address 01: Engine Labels: 077-907-558-BCY.lbl
Control Module Part Number: 4D1 907 558 D
Component and/or Version: 4.2l V8/5VT G 0003
Software Coding: 0006752
Work Shop Code: WSC 13876 409 403238
VCID: 2F6DA5B7BDCF6D6088F
3 Faults Found:

16487 - Mass Air Flow Sensor (G70)
P0103 - 001 - Signal too High - Intermittent
17482 - Mass Air Flow Sensor 2 (G246)
P1074 - 001 - Signal too High - Intermittent
18032 - MIL Request Signal Active (Check TCM for errors too!)
P1624 - 008 -

Readiness: 0000 0000
Tuesday,14,August,2012,12:58:37:53793
VCDS Version: Release 11.11.4 (x64)
Data version: 20120807


Address 02: Auto Trans Labels: 01L-927-156.lbl
Control Module Part Number: 4B0 927 156 FL
Component and/or Version: AG5 01L 4.2l5VT USA 0305
Software Coding: 0000002
Work Shop Code: WSC 02195 785 00200
VCID: 76E350D302151CA80B9
1 Fault Found:

17114 - Gear Ratio Monitoring
P0730 - 003 - Incorrect Gear Ratio - Intermittent - MIL ON
Tuesday,14,August,2012,13:00:07:53793
VCDS Version: Release 11.11.4 (x64)
Data version: 20120807


Address 03: ABS Brakes Labels: 4B0-614-517.lbl
Control Module Part Number: 4B0 614 517 AD
Component and/or Version: ESP 5.7 RS 6 2310
Software Coding: 06697
Work Shop Code: WSC 02195
VCID: 63C51987F18799005C7
3 Faults Found:

00532 - Supply Voltage B+
07-00 - Signal too Low
01119 - Gear Recognition Signal
35-10 - - - Intermittent
18265 - Load Signal
P1857 - 35-10 - Error Message from ECU - Intermittent

[lswing]

Sounds like the Trans...never got those codes when my TC failed...nor was it that bad...yikes! Good luck on a quick fix!

Trans fluid level is perfect yes?

[Brav]

Sounds like the Trans...never got those codes when my TC failed...nor was it that bad...yikes! Good luck on a quick fix!

Trans fluid level is perfect yes?

Don't like to hear that. It should be, I had it serviced by Raven less than 2 years ago with Quantum Blue

[lswing]

There's also the associated valve body I believe. You could have a small leak that burns off, never drips, two years is a long time, get that fluid checked!

Worse case, you get it rebuilt better than stock!

[ben916]

I am gonna roll the dice and say that it is:

The transmission gear selector circuit board.

[Brav]

I am gonna roll the dice and say that it is:

The transmission gear selector circuit board.

Oh yea? heard of this happening before? Would that be different form the TCU?

[ben916]

Oh yea? heard of this happening before? Would that be different form the TCU?

John (Audi5000csqt) had that problem where the PRNDS would light/blink then he shut off car, presto! everything is good! Start it the next day, PRNDS is lite. This continued for a while... card was bad... not sure if it effected the shifting of the transmission or signals to shift.
The card is between the transmission and the body = transmission drop to access.

I hope I am wrong...for your sake

[4everRS]

Its the trans. Not TC

[Brav]

my god... maybe I should bite the bullet and go 6sp.

[ttboost]

my god... maybe I should bite the bullet and go 6sp.

..was gonna suggest that..might cost you the same ..if you gather parts and do it yourself...good luck with whatever you decide...

[Brav]

Its the trans. Not TC

Why do you say that?

[Brav]

..was gonna suggest that..might cost you the same ..if you gather parts and do it yourself...good luck with whatever you decide...

I don't think I could do this myself. Physically, yes. Mentally.. I dont think I have the patience. SpeedTrapped gave me a great line on a rebuilt AT, it would be hard to pass up.

[4everRS]

Why do you say that?

Incorrect gear ratio usually is clutch packs not holding. TBH, I would first check the fluid level. This can cause the code too.

[Brav]

Incorrect gear ratio usually is clutch packs not holding. TBH, I would first check the fluid level. This can cause the code too.

Makes sense. but when it would slip, all 5 gears would. not just one. Then, all back to normal. So all go bad together?

[ttboost]

Much like a regular clutch, the higher gears slip first. If the lower gears slip (1st ans 2nd) thats really bad. I agree that it could very well be fluid level.

[4.2Crew]

Just out of criousity, if the fluid IS low, wouldn't there be signs of significant leakage?... And, are these transmissions THAT sensitive and dependant upon such a narrow level of fluid level? Wow!... It would be nice to hear his resolution is simply a drain and fill!

I remember reading in a prior thread that these transmission's prefer to be slightly overfilled...

Brav, good luck guy!... You've done an excelent job in the past keeping us posted in excercising previous demons! Please keep as updated on your progress!

[mnsnwbrdr]

Mine threw P0730 when gears 2-3 went on my transmission - and it was definitely those two gears, the rest were good.

[Brav]

Haven't noticed any leaks. Yea thats the thing.. ALL GEARS SLIP, when it slips.. its intermittent. One stoplight its perfect. The next, schitzo. But I just drove it home and haven't driven it since. Methinks it could be a control module/electrical issue, or bad valve body. I hope. those seem like simpler and cheaper fixes...