2002 s6 avant tranny trouble

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Old 07-30-2018, 01:22 PM
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Join Date: Jul 2018
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Default 2002 s6 avant tranny trouble

Sup guys. New here, so please bear with me. I'm having an issue with my tranny. Trying out the forums to see if it's a DIY fix before going to a shop. I'm no mechanic, but I can do some things.


I have a 2002 audi s6 avant. Has a 4.2 v8 engine. Automatic tranny. 175k miles. So my issue is intermittent, when it's not present, my cars a beast. Sometimes when I start my car, and throw it into gear, the tranny lags before it engages, and when it finally engages it's a rough jerk, and typically goes into limp mode where I have to turn the car off and try again. It's more prominent when going into reverse but also gives me trouble when going in to drive. Sometimes when going in to drive the tranny won't go into limp mode and there is no hard jerk but My tranny won't shift. If I push on the accelerator it'll just keep revving higher and higher and it will barely move. After going into ment mode I turn it off started again and repeat the cycle. If I ride the break off as it shifts it is less likely to go into limp. it's normal it's Great. I'm throwing an engine light, but it's for my o2 sensor since my exaughst needs some love.

I suspect it's a sensor, or an electrical issue. My headlights tend to dim out at times, as well as my dash display gets dim at times, like real dim. The transmission problem it worse when the dash is dim. I've noticed my battery voltage seems to fluctuate quite a bit as well, at the same time my oil temp, and coolant temp seems to rise above normal. I've tested both my battery and alternator and both are normal.

I've not checked my trans. Fluid, given theres no dipstick so I'm not sure how to. Feel free to fill me in. I love my car and want to bring it back to life.
 
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