Touareg: 2015 V6 TDI
Join Date: Jul 2017
Second Vehicle: is not a VW
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Ok, so I thought I'd wait a while to report back if the software update made any difference at all. Well, it would appear not.
This is a strange issue. The behaviour is exactly the same; upon cold conditions, the TReg has trans issues. Setting off is fine. 1st to 2nd gear - no problem, 2nd to 3rd - no problem. 3rd to fourth however... it seems like the trans (very quickly - barely noticeable) tries to go into 4th gear and then changes its mind and stays in 3rd, although the display on the dash says 4th. The display on the dash will then move up to 5th, but it still hasn't changed gear from 3rd. By the time I've covered approx 1 mile, I slow down to a stop, start again as normal and the trans will generally go through all the gears fine. It would appear that 'something' has warmed up enough to function properly after roughly a mile.
So... No idea what controls the transmission (perhaps a dedicated transmission control module?) or the main ECU, or even a whole host of other computers, I don't know. I dislike having the rev the engine that much when its cold. Given this thing only has 25k miles on it, i'm surprised by this problem, and especially that the first registered owner of the car was VW themselves! Maybe this is why they got rid of it? Not their problem anymore? Who knows.
Why the disparity between what gear the trans is actually in and what the display says? What controls the dash-based gear readout?
Why only when cold?
I can't find any other reports of these symptoms.
Time to book it back into VW for further tests.