Today as I was driving my '08 A6 coupe, the transmission started to do some weird thngs. When I backed out of a parking spot (this happened several times) and selected "D", the car would not move for a few seconds and when it did the car jerked forward. Then it started to miss shifts while driving and the engine would rev up for 3-4 seconds, then catch. Acceleration was sluggish, so I took it to the dealer. The car has less then 1800 miles on it. Last week when I installed Exotic Vette's rear insulation kit, I disconnected the battery as per the instructions. Could this be causing the problems? I got no codes and no lights. Thanks for any input. Larry

 

No ideas, but it almost sounds as if the car's running out of juice (electrical). But no codes.....hmmm. Be interested in what the dealer sez if they find anything at all.

 

When moving the shift lever between gears (P, R, D etc.) I always wait a second or two before stepping on the gas. Sometimes there can be a short delay where the car is still in neutral before it engages and by tapping the gas immediately after shifting into the desired gear you're almost doing a 'neutral drop', not a good thing to do to one's transmission. Not sure if that's what you're experiencing but it's possible.
Disconnecting the battery should not have caused this, if anything I often recommend just that (disconnecting battery overnight) as a possible cure for ailments such as this LOL.

 

I had the same problem with mine, then it started to have problems shifting while moving. I called OnStar, they told me not to drive it and they had it towed in. There is a service bulletin regarding this issue and they replaced the valve body. Mine was built on 12/17/07.

 

This is very wise advice for all automatic transmissions.

 

Quote:

"When moving the shift lever between gears (P, R, D etc.) I always wait a second or two before stepping on the gas. Sometimes there can be a short delay where the car is still in neutral before it engages and by tapping the gas immediately after shifting into the desired gear you're almost doing a 'neutral drop', not a good thing to do to one's transmission. Not sure if that's what you're experiencing but it's possible.
Disconnecting the battery should not have caused this, if anything I often recommend just that (disconnecting battery overnight) as a possible cure for ailments such as this LOL."

I agree and try to do this when shifting from one gear to another. I wait until I "feel" the trans shift to whatever gear I have selected. What was happening was, I did "feel" it shift so then applied the gas, a lag occurred and then the jerk when the trans caught. After a couple of times of this, I was very judicioius in applying the gas. Thanks for your input.


Dealer just called. It is the valve body just as you said and I asked about the SB and he agreed. They are airlifting a valve body from Lansing, MI and should have the car back to me on Wednesday. Thanks for your input.

 

Can someone post the SB number and affected VIN's -

 

that sucks dude best of luck

 

I have the same problem. Took it to dealer today. They could not find any Service Bullitin. Told me to just drive it that way. Can someone please post the SB number so I can tell the dealer.

 

Damn, is this just on the 2008s?
I know some 2006/2007 A6s had a couple minor issues as well but this is just odd.
LS3 hitting the 6L80 with just a bit too much power maybe?

 

It's the added TM that GM put in there for the LS3s....it's causing problems with the check ***** in the valve body and trans failure....thats what I heard anyways.

 

Argh.

 

Ain't that the truth.

 

There are several trans. bulletins, it may be this one, it would help if he knew if any codes.

#PIP4184B: MIL And Any Combinationof DTC P0756 P0776 P0796 P2714 P2723 - keywords intermittent ses - (Dec 20, 2007)


MIL And Any Combination of DTC P0756, P0776, P0796, P2714, P2723


Models: 2006-2008 Cadillac XLR-V, STS-V

2008 Cadillac CTS

2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT, SRX, STS, XLR

2006-2008 Chevrolet Corvette

2007-2008 Chevrolet Silverado

2007-2008 GMC Sierra, Yukon Denali, Yukon Denali XL

2008 Hummer H2

Equipped With 6L50, 6L80 or 6L90 (RPOs MYB, MYC, MYD) Automatic Transmission




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This PI Supersedes To Add Models. Please Discard PIP4184A.


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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Some customers may comment on a transmission concern where the MIL is illuminated and any of the above listed DTCs may be found in the TCM as active or history codes.

Recommendation/Instructions:
Perform the following service procedures:

Record Freeze Frame / Failure Data for all DTCs. This can be done electronically with the Tech 2 by capturing the data or by manually writing down the parameters. This data may be requested by TAC if further assistance is needed.
Check and note the transmission fluid level and condition. If the level is high or low it should be corrected and the vehicle road tested to verify that the condition is still present.
Remove the transmission bottom pan to inspect for possible debris. If debris is found the transmission should be disassembled to determine the source. Repair or replace the transmission in the most economical method following guidelines in the latest version of bulletin 02-07-30-029.
If no debris is noted in the oil pan remove the valve body / control solenoid and module assembly. Disassemble the valve body to: Inspect the check ***** for roundness ensuring that there are no flat spots. Inspect the spacer plate for debris, burrs or flashing on the orifices. Measure all the valve body bore plug (328) diameters. Specification = 11.502 mm +/- 0.004 mm. Undersize bore plugs should be replaced. Inspect all valves for freedom of movement and correct travel.
Based on the specific DTC carefully inspect the following valves for freedom of movement and correct travel.
P0756 - Clutch select valve 3 (352) (closer to the manual valve) in the lower valve body (307).

P0776 - 3-5-R clutch regulator valve (336) in the upper valve body (321).

P0796 - CBR1/4-5-6 clutch regulator valve (327) in the upper valve body (321).

P2714 - 2-6 clutch regulator valve (334) in the upper valve body (321).

P2723 - 1-2-3-4 clutch regulator valve (337) in the upper valve body (321).`

• If a concern is found in the respective valve line-up remove the valve from the valve body.

• Once valve is removed inspect for any scratching or scoring.

• If any is found then the fingernail test will need to be performed.

• Using your fingernail to move over scratches to see if nail will try to catch on the scratch or score.

• If so then valve body will need to be replaced.

• It has been found that in most cases that the scratches are not severe enough to catch your fingernail.

• In this case the valve should be cleaned with some type of contact or brake cleaner.

• The bore should also be cleaned. Clean with machined side down so debris may escape.

• Blow off with shop air.

• To verify free movement of the valve, dip into clean ATF and install valve back into the bore, the valve should move freely. If the valve moves freely, in most cases the valve body will function properly when reinstalled.

• Reassemble and retest.

If no issues are noted in the valve body inspection replace the control solenoid and module assembly (314). If the concern was a DTC P2723 the input / output speed sensor assembly (303) should also be replaced.

OR
#PIP4304A: DTC P0878 P2714 P2723 Transmission Slips In 1st 2nd 3rd Or 4th Gears And/Or Long Garage Shifts To Drive - keywords delay engage MIL - (Feb 11, 2008)


DTC P0878, P2714, P2723, transmission slips in 1st, 2nd, 3rd or 4th gears and/or long garage shifts to drive


Models: 2008 Cadillac CTS, Escalade, Escalade ESV, Escalade EXT, SRX, STS, STS-V, XLR, XLR-V

2008 Chevrolet Corvette, Silverado, Suburban,

2008 GMC Sierra, Yukon Denali, Yukon Denali XL

2008 Hummer H2

Equipped With a 6L50 (MYB), 6L80 (MYC) or 6L90 (MYD) Transmission




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

This PI was superseded add dtc P0878. Please discard PIP4304.


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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Customer concerns where the MIL may be illuminated and DTC P2714 and or P2723 usually along with P0878 may be found in the TCM as active or history codes. Additionally, a DTC may not be set and the customer may comment on very long park/neutral/reverse to drive garage shifts (2-3 seconds) or transmission slipping or flaring when shifting into 1st, 2nd, 3rd or 4th gears (upshifts/downshifts/steady state high throttle conditions)

Important: The above information would only apply to vehicles built between Oct 15, 2007 and 15 Jan 2008 (use GM VIS to verify).

Recommendation/Instructions:
Confirm condition in vehicle

• Drive the vehicle to verify customer concern


• Time the garage shift from lever movement to engagement into drive (greater than 2 seconds indicates a concern).


• Clutch slippage during "Stall" maneuver in drive (Chock a wheel, apply park brake and service brake, transmission in drive, increase throttle, limit to 2000 RPM, limit time to 2 seconds, stop test immediately if flare occurs).


If vehicle operates correctly condition may have corrected itself (sediment dislodged and blown out to sump) and part replacement may not be necessary

• If oil is in good condition (red in color) and does not have a burned odor, clear any DTCs, repeat drive audit, if no issues, return vehicle to customer.


• If oil is darkened with a distressed odor and/or pan has excessive clutch debris, disassemble the transmission for cleaning and to replace the 1-2-3-4 clutch plates, flush and flow check the transmission cooler using J-45096.


If condition is confirmed, remove transmission oil pan and inspect for darkened oil (Black / dark red in color) with a distressed odor and/or excessive clutch material in pan.

• If oil is in good condition and pan is clean, replace Control Solenoid Valve and Transmission Control Module Assembly


• If oil is darkened with a burned odor and/or pan has excessive clutch debris replace Control Solenoid Valve and Transmission Control Module Assembly and disassemble the transmission for cleaning and to replace the 1-2-3-4 clutch plates, flush and flow check the transmission cooler using J-45096.

 

This is what was up with my trans...

Condition/Concern:
Customer concerns where the MIL may be illuminated and DTC P2714 and or P2723 usually along with P0878 may be found in the TCM as active or history codes. Additionally, a DTC may not be set and the customer may comment on very long park/neutral/reverse to drive garage shifts (2-3 seconds) or transmission slipping or flaring when shifting into 1st, 2nd, 3rd or 4th gears (upshifts/downshifts/steady state high throttle conditions)

Important: The above information would only apply to vehicles built between Oct 15, 2007 and 15 Jan 2008 (use GM VIS to verify).

Recommendation/Instructions:
Confirm condition in vehicle

• Drive the vehicle to verify customer concern


• Time the garage shift from lever movement to engagement into drive (greater than 2 seconds indicates a concern).


• Clutch slippage during "Stall" maneuver in drive (Chock a wheel, apply park brake and service brake, transmission in drive, increase throttle, limit to 2000 RPM, limit time to 2 seconds, stop test immediately if flare occurs).


If vehicle operates correctly condition may have corrected itself (sediment dislodged and blown out to sump) and part replacement may not be necessary

• If oil is in good condition (red in color) and does not have a burned odor, clear any DTCs, repeat drive audit, if no issues, return vehicle to customer.


• If oil is darkened with a distressed odor and/or pan has excessive clutch debris, disassemble the transmission for cleaning and to replace the 1-2-3-4 clutch plates, flush and flow check the transmission cooler using J-45096.


If condition is confirmed, remove transmission oil pan and inspect for darkened oil (Black / dark red in color) with a distressed odor and/or excessive clutch material in pan.

• If oil is in good condition and pan is clean, replace Control Solenoid Valve and Transmission Control Module Assembly


• If oil is darkened with a burned odor and/or pan has excessive clutch debris replace Control Solenoid Valve and Transmission Control Module Assembly and disassemble the transmission for cleaning and to replace the 1-2-3-4 clutch plates, flush and flow check the transmission cooler using J-45096.

after the first dealership put over 100 miles on it with the trans in this condition, the damage, of course , got worse. They tried to blame it on me, saying I abused the car. I guess the district service rep thought differently, as there's a new trans and tc in the vette in my garage as we speak. Abuse, my hind quarters....

 

Is the car safe enough to drive to the dealer, I am having the same problem with my 08 built on 1/9/08