Jump to content

E Gear problem after Launch Control


cuhuba
 Share

Recommended Posts

2008 Lap640: So 3 months ago I did 3 passes at the Dragstrip. Unintentionally I dumped into launch control since I had the TCS off. It was a violent spinning of all 4 wheels. I want to say I got up to 2nd or 3rd gear when lights started going off on the cluster and the dreaded egear fault light. The car went into limp mode, only going into 1st, neutral, reverse and not registering any speed on the speedometer.

My trusted tech told me it was the transmission speed sensors, and since the car had what We thought was a rear main seal leak (pre existing annoying leak for months), out comes engine and tranny. I went ahead and upgraded to a Kevlar clutch, new throw out bearing (since this is what was actually leaking), rear main seal, new transmission sensors etc.

Car gets put back together, and now THE SAME SHIT! It’s still only going into 1st, neutral, reverse and no speed registering. My tech has ran every diagnostic whatever possible, swapped in a loaner egear ECU and nothing. The car will shift through all gears with the ignition switch on before and after the surgery.

He thinks it’s an electrical issue somewhere and is trouble shooting.

I’m trying to see what is the correlation between my violent launch and what’s going on. Any thoughts?

Share this post


Link to post
Share on other sites

Who do you have working on it? Independent or authorized dealer? Sounds like an independent from the nature of the description. Depending on what computer he is using to diagnose it, it might be time to get to a dealer that can enlist the support of the factory to diagnose. Otherwise you may start throwing unnecessary parts at the car.

 

It sounds like a sensor issue based on the symptoms but there are a lot of sensitivities within the way the gearbox/pump/actuators work so it is definitely worth investing in a proper diagnosis before you start buying more parts and pulling the motor again.

Share this post


Link to post
Share on other sites

  • 1 month later...

The transmission has 2 sensors, oddly enough they are identical parts. They are cheap two, as they are Audi parts. Swap those with new ones and you should be ok.

 

If that doesn’t do it, then I’d be worried you snapped of gears that those sensors use to read shaft speed.

 

I know WAY more about this than most (including Lambo techs) as I blew my transmission in my 06 murci and I replaced it with an lp640 and the car did NOT like that because the gear ratios are different so it didnt like what it thought was improper shaft speeds. I solved it with a computer that adjusts the numbers for the shaft speed so the car is happy.

 

My guess is its one of those sensors, again there is only 2. Hell I probably have a spare one in my garage.

 

Not sure you want to do this BUT before i solved the problem correctly, I found TWO work arounds:

 

1. Put the car into ‘slippery when wet’ mode and it will ahift it at 3500 or so in each gear.

2. While it wont accept input from your paddle shifters on upshift, it sure will protect itself and as you come close to redline it will shift into next gear. Bet you didn’t know that :). It doesn’t care about the sensors anymore, once you hit redline its gonna shift. Also once its shifted into secondif I recall correctly, all gears become available to you again UNTIL you show down and drop back into first. Then you have to pick options 1 or 2 again to get next gear.

 

Hope this helps, been there, done that... but rest assured its solveable... I did it.

 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...