Join Date: Oct 2015
Location: Minneapolis, MN
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Hard Shifts after driving at speed
Hello - I didn't see this problem posted yet. I have a 2005 A4, all stock but CAI and mufflers. It has 43,xxx miles.I've owned it since Aug 2015. Last year I didn't have this problem and it has now occurred twice, consecutively.
Driving at normal highway speeds, up to 90mph for 30-60 minutes, then I pulled off the freeway, hit a few stop signs to putter around in a local town, the car shifts fine.
Last week and this week, I was on a few speed runs. We drove 100mph for a while, say 10-20 minutes, then hit 140. Got off the freeway and once we stopped at a stop sign (was in 1st) the shift from 1st to 2nd, then 2nd to 3rd was hammered, a real slam. And a few times there was a delay, half second, before it shifted and the shift was again slam. (this was at normal driving speeds, say up to 40mph). I then stopped for some food, the car sat for 40 minutes and when we started to drive, the shifting was "normal". We didn't do anymore high speed runs, normal freeway speeds.
Just today, we did the same speed runs, 100mph+ and topped out at 147mph (fastest yet). We were driving at these speeds for about 20 minutes. When we pulled off the freeway, again, really hard slams for shifts at normal speed (1 to 2, 2 to 3, 3 to 4 - up to 45mph). We stopped for food and turning the car back on, it shifted fine all the way home. Going home never exceeded 90mph.
My thoughts are heat or the ECU is getting confused: the stop cools the fluid or the stop/restart resets the ECU. The tranny fluid is full, no other issues.
TIA - Goat51..
ps. anyone know a good motor/tranny shop in Minneapolis/St.Paul, MN?