Supercharged A6 2nd gear slipping
Thread Starter
Burning Brakes
Joined: Mar 2008
Posts: 949
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From: Williamsburg Virginia
Supercharged A6 2nd gear slipping
I have a few hundred miles on my self installed TVS 1900 supercharged 2008 with A6 (570RWHP/545RWTQ) and it slips only in second gear from a complete or nearly complete stop after it warms up, which takes about 5 miles or so. I can take off from 1st and no problems, in Drive no problem, only while is sport mode in second from a stop. My axle nut was really loose causing a clunk, tightened it and clunk is now gone. I changed the diff fluid and had some metal shavings but I was told that is normal, only 2nd is a problem. I checked tranny fluid, it was OK. A little over 8K on Vette, been known to exercise right pedal but not to the floor since SC install. PS2 345 on the back for additional stress on the drive train.
I was planning on upgrading the A6 and diff when funds were better. Now I am thinking I might be placing an order for a new A6 in the very near future.
Any ideas?
TIA
I was planning on upgrading the A6 and diff when funds were better. Now I am thinking I might be placing an order for a new A6 in the very near future.
Any ideas?
TIA
Thread Starter
Burning Brakes
Joined: Mar 2008
Posts: 949
Likes: 0
From: Williamsburg Virginia
I talked to RPM, they have them out but I was hoping to wait a few months for the next upgrade.
The A6 has been tuned, I talked to the tuner and when I have time I will take it down. I was wondering if unplugging the computer to make it relearn will help.
The A6 has been tuned, I talked to the tuner and when I have time I will take it down. I was wondering if unplugging the computer to make it relearn will help.
Safety Car
Joined: Sep 2006
Posts: 3,922
Likes: 4
From: Cheektowaga NY
St. Jude Donor '08
The tranny will always start in 1st gear unless you engage the paddles and then you have to paddle back to start in 1st. Your really not supposed to start out in 2nd, and thats why 2nd gear is slipping. Start in 1st and your problems are solved.
Thread Starter
Burning Brakes
Joined: Mar 2008
Posts: 949
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From: Williamsburg Virginia
When I pull up to a light or stop sign the A6 automatically drops to second gear, not first. I don't have slippage when I drop it down to first manually. I think when I go from reverse to forward it starts in 1st. I would take it out to check now but I have had to many beers.
Safety Car
Joined: Sep 2006
Posts: 3,922
Likes: 4
From: Cheektowaga NY
St. Jude Donor '08
When I pull up to a light or stop sign the A6 automatically drops to second gear, not first. I don't have slippage when I drop it down to first manually. I think when I go from reverse to forward it starts in 1st. I would take it out to check now but I have had to many beers.
Thread Starter
Burning Brakes
Joined: Mar 2008
Posts: 949
Likes: 0
From: Williamsburg Virginia
When I have the NAV on it shows 2nd on the DIC but I believe you are right it is monetarily suppose to be in 1st even though my DIC does not show it. This might be the problem area, maybe when in sport mode it is starting out in 2nd instead of dropping to 1st.
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Safety Car
Joined: Sep 2006
Posts: 3,922
Likes: 4
From: Cheektowaga NY
St. Jude Donor '08
Unless you have a problem with the trans, you are starting in 1st.
Last edited by Tony B4; Jul 13, 2009 at 09:11 PM.
Melting Slicks
Joined: Feb 2006
Posts: 2,261
Likes: 1,431
From: Brentwood CA
I could be wrong, but the A6 does not show what gear you are in on the HUD unless you engage the paddles (at least it doesn't show it on my 06 A6). If the HUD shows what gear you are in, you either activated the paddles or there is something wrong with your tranny while you are in Sport mode. Or, I could be wrong. 
Lastly, I agree with others that the A6 will always start from 1st gear from a stop when either in D or S mode. I've tested it numerous times. The only exception is paddle mode. If you engage the paddles, it won't go into first unless you put it there.
Lastly, I agree with others that the A6 will always start from 1st gear from a stop when either in D or S mode. I've tested it numerous times. The only exception is paddle mode. If you engage the paddles, it won't go into first unless you put it there.
Last edited by Dave O; Jul 13, 2009 at 09:22 PM.
Thread Starter
Burning Brakes
Joined: Mar 2008
Posts: 949
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From: Williamsburg Virginia
Thanks for your help guys. I use the paddles 99 percent of the time. I will do some playing around without the paddles. Now that I think of it, last year at the track it would take off in first and shift up when it hit a certain RPM. When I program a destination in the NAV my gear selection shows on the DIC, I am pretty sure the display doesn't drop to first but again I use the paddles 99 percent of the time. No rain today so I will play around.
I have EFILive but need to setup my new laptop then I can poke around to see what it can see.
I have EFILive but need to setup my new laptop then I can poke around to see what it can see.
Last edited by thegreenman; Jul 14, 2009 at 06:47 AM.
Thread Starter
Burning Brakes
Joined: Mar 2008
Posts: 949
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From: Williamsburg Virginia
I drove to work this morning. Pulled out of driveway, placed into S mode I could feel first on take off. Paddle mode now, shifted to third and pulled up to stop sign, automatically dropped to second, HUD showed second gear at stop sign, complete stop, take off and I could tell it was taken off in second, not first. Next stop light, down shift to first manually, HUD shows 1st and it does take off in first. Next light, HUD shows second, I placed in Drive and it automatically drops to first, I could feel it drop when I placed it into D. Take off was also in first gear.
I guess I need to figure out why it isn’t dropping to first gear in S mode when using the paddle shifter. I believe it has always done this since I bought the car new, maybe now with the extra TQ it is complaining.
I guess I need to figure out why it isn’t dropping to first gear in S mode when using the paddle shifter. I believe it has always done this since I bought the car new, maybe now with the extra TQ it is complaining.
Thread Starter
Burning Brakes
Joined: Mar 2008
Posts: 949
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From: Williamsburg Virginia
Racer
Joined: May 2006
Posts: 376
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From: Suburbs of New Orleans La
A6 paddles
So I adopted a different method of being in first then bumping the shifter up to normal D. Doing it this way I get a clean shift to 2nd. I have been told that the computers are not letting the car shift in paddle mode because they detect potential slippage.
Any clues out there?
Team Owner
Joined: Jan 2007
Posts: 22,136
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From: In the woods looking for my thrown putter.
St. Jude Donor '13, '15
I have an untuned LS3 A6 that I love, with one exception: If I am trying to launch from a rolling start, when I nail it, I always hit the friggin rev limiter in first. I tried hitting the paddle way early, but it always seems to hold first until I back off. This is with all of the electronic nannys activated. I have not tried it with trac off.
So I adopted a different method of being in first then bumping the shifter up to normal D. Doing it this way I get a clean shift to 2nd. I have been told that the computers are not letting the car shift in paddle mode because they detect potential slippage.
Any clues out there?
So I adopted a different method of being in first then bumping the shifter up to normal D. Doing it this way I get a clean shift to 2nd. I have been told that the computers are not letting the car shift in paddle mode because they detect potential slippage.
Any clues out there?
If I remember correctly, when the wheels are spinning and traction control is engaged, the car will not shift to second gear until traction control disengages. The reason for this is when the wheels are spinning a shift to second could cause a potential loss of control. When trying to shift have you noticed on the DIC if it says "traction control active" (or whatever it says exactly)?
Race Director
Joined: Oct 2007
Posts: 11,367
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From: Edgewood Washington
St. Jude Donor '11-'12-'13-'14-'15
Again- if you use the paddles you have to put the tranny into 1st manually.
If you don't use the paddles the tranny will start out in 1st from a stop, D or S.
You can change this with a tune, i.e. have the tranny shift to 1st when in paddle mode, you can even choose the speed at which this happens.
If you don't use the paddles the tranny will start out in 1st from a stop, D or S.
You can change this with a tune, i.e. have the tranny shift to 1st when in paddle mode, you can even choose the speed at which this happens.
Racer
Joined: May 2006
Posts: 376
Likes: 0
From: Suburbs of New Orleans La
Have not noticed
If I remember correctly, when the wheels are spinning and traction control is engaged, the car will not shift to second gear until traction control disengages. The reason for this is when the wheels are spinning a shift to second could cause a potential loss of control. When trying to shift have you noticed on the DIC if it says "traction control active" (or whatever it says exactly)?