So this is weird...
Thread Starter
Instructor
Joined: Apr 2017
Posts: 137
Likes: 8
From: San Clemente California
So this is weird...
Afternoon everyone, so I've had yet another one of a million strange things happen with my new (to me) C5. She's an 01 A4 coupe with just over 70k on her. And besides all the funny little quirks these cars have, and me doing a back to front on her, from bumper to bumper fixing all the little things that they are prone to, one thing I'm not finding other first hand stories on is how mine shifts under WOT. I had an 03 back in 05, same options, and it worked like you would think. However my new one shifts MUCH faster from 1-2 and 2-3 when left in drive rather than keeping it in gear and shifting like normal. When shifting by hand theres a noticeable delay. Has anyone heard of this or know what to do about it? Im looking to get this girl running and looking new again. Thanks in advance for your help and for reading, I hope everyone is having a great Tuesday!
-Gabe
-Gabe
Instructor
Joined: Aug 2013
Posts: 118
Likes: 4
From: Vancouver BC
Afternoon everyone, so I've had yet another one of a million strange things happen with my new (to me) C5. She's an 01 A4 coupe with just over 70k on her. And besides all the funny little quirks these cars have, and me doing a back to front on her, from bumper to bumper fixing all the little things that they are prone to, one thing I'm not finding other first hand stories on is how mine shifts under WOT. I had an 03 back in 05, same options, and it worked like you would think. However my new one shifts MUCH faster from 1-2 and 2-3 when left in drive rather than keeping it in gear and shifting like normal. When shifting by hand theres a noticeable delay. Has anyone heard of this or know what to do about it? Im looking to get this girl running and looking new again. Thanks in advance for your help and for reading, I hope everyone is having a great Tuesday!
-Gabe
-Gabe
Thread Starter
Instructor
Joined: Apr 2017
Posts: 137
Likes: 8
From: San Clemente California
Le Mans Master
Joined: May 2006
Posts: 7,853
Likes: 242
From: Hillsboro OR
You can adjust:
Upshift MPH and RPM for each gear
Downshift MPH and RPM for each gear
Shift speed (in milliseconds)
Shift line pressure
and many more parameters...
Have someone that understands trans tunes assist you in setting it to your liking.
Thread Starter
Instructor
Joined: Apr 2017
Posts: 137
Likes: 8
From: San Clemente California
These A4's don't need a shift kit. They are highly tune-able.
You can adjust:
Upshift MPH and RPM for each gear
Downshift MPH and RPM for each gear
Shift speed (in milliseconds)
Shift line pressure
and many more parameters...
Have someone that understands trans tunes assist you in setting it to your liking.
You can adjust:
Upshift MPH and RPM for each gear
Downshift MPH and RPM for each gear
Shift speed (in milliseconds)
Shift line pressure
and many more parameters...
Have someone that understands trans tunes assist you in setting it to your liking.
-Gabe
Advanced
Joined: Dec 2016
Posts: 64
Likes: 34
From: Ohio
Gabe - Personally, I would take it to a professional tuner. Unless you are comfortable and knowledgeable with tuning yourself, that is. I had mine tuned by a pro and he spent a good 5-6 hours tuning, running on the dyno, rinse, repeat and he's been doing it for years. Money well spent.
Instructor
Joined: Aug 2013
Posts: 118
Likes: 4
From: Vancouver BC
But there could be many explanations for what's happening of course. just a thought.
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Thread Starter
Instructor
Joined: Apr 2017
Posts: 137
Likes: 8
From: San Clemente California
Gabe - Personally, I would take it to a professional tuner. Unless you are comfortable and knowledgeable with tuning yourself, that is. I had mine tuned by a pro and he spent a good 5-6 hours tuning, running on the dyno, rinse, repeat and he's been doing it for years. Money well spent.
-Gabe
Instructor
Joined: Aug 2013
Posts: 118
Likes: 4
From: Vancouver BC
Sorry I cant really think of one, other than it might look cleaner than the rest of the undercarriage if it was done fairly recently I guess. Others who know more than me might have some ideas.
Burning Brakes
Joined: Mar 2014
Posts: 807
Likes: 239
Manually shifting these automatics isn't actually commanding a shift. It's more like telling the transmission you are ready for a shift but you won't get one until the same programmed parameters have been met as if you left it in drive. The delay is normal and just feels odd. You push the lever but nothing happens right away. Now if you were to shift at the exact same moment the transmission met the programmed requirements, which include but aren't limited to, engine rpm, throttle position, vehicle speed etc it would shift immediately. There is nothing wrong with your transmission. A tune can only adjust shift firmness and movement up or down the rpm range. Increasing the actual speed of the shift gets much more technical. (And expensive)
Le Mans Master
Joined: May 2006
Posts: 7,853
Likes: 242
From: Hillsboro OR
Tuning auto transmissions can't effectively be done on a dyno. I have found that you need to do a "street tune". I ended up buying the HP Tuner SW. Load the SW to a laptop. Connect the laptop and cable interface to your OBD port. Then make the changes you want, try it, pull over and re-adjust. Rinse and Repeat.
Thread Starter
Instructor
Joined: Apr 2017
Posts: 137
Likes: 8
From: San Clemente California
Dyno tuning is primarily for engines. I agree to wait until your bolt-ons are complete.
Tuning auto transmissions can't effectively be done on a dyno. I have found that you need to do a "street tune". I ended up buying the HP Tuner SW. Load the SW to a laptop. Connect the laptop and cable interface to your OBD port. Then make the changes you want, try it, pull over and re-adjust. Rinse and Repeat.
Tuning auto transmissions can't effectively be done on a dyno. I have found that you need to do a "street tune". I ended up buying the HP Tuner SW. Load the SW to a laptop. Connect the laptop and cable interface to your OBD port. Then make the changes you want, try it, pull over and re-adjust. Rinse and Repeat.
-Gabe