Good afternoon all.
I bought this car ~1 month ago. It's done 90000 miles. I also own the Bently service manual for the car. The transmission is 5 speed, auto tiptronic.
A licensed dealer did the 80000 mile service at 86000 miles. I didn't own the car then though.
Was running fine in Florida (warm). I just went on a road trip ~2000 miles. Enroute, I blew an ignition coil. It was in cylinder 4 and the misfiring was shaking the car up pretty bad. Found a local mechanic (it was a small town on the weekend) and we diagnozed the problem then moved the coil to cylinder 3, as it ran a lot better. I couldn't buy the part there, so I drove ~60 miles to get to my destination, where a VW dealer was located. The shaking of the car decreased noticably over 3000 revs - you could tell it was still misfiring, but it wasn't too bad.
Next morning, on my way to the dealer to get the part, this transmission problem 1st appeared (this is about 1 week ago from the date of this post). Now it could be related, or just coincidence. The weather got noticably cooler (Nth Georgia, Sth Tenn.) hereon in. I replaced the faulty coil and now the engine's running nicely again.
Transmission problem details:
Initially it wouldn't shift out of 1st, even when up to 5000 revs - however the tiptronic indicator said it was in 2nd or 3rd - no matter how I shifted it, it stayed in first. No alarms are posted on the dashboard, from the computer. After some time going around in circles, it eventually changed gears and then worked perfectly. Upon starting and stopping multiple times that day, it worked perfectly - however next morning same deal - stuck in first. So my assumption is that the problem is due to the transmission fluid being cold. This problem has continued every morning since.
I have just arrived back in Florida last night and it's still happenning - despite the warm weather. It's also becoming more frequent - i.e. if the car's parked more than a couple hours, it'll happen. Initially this wasn't the case - it was overnight only.
My standard method of getting the car working now: Drive on backstreets @ ~3000 revs max., all the while using the tiptronic to try and get it to move from 1st to 2nd. After ~5-10 minutes of this, it'll change and then run perfectly. No alarms have ever been displayed for this on the console.
I don't know when (if ever) the auto transmission fluid has been changed. According to the Bently service manual, it is checked at 80 000, but not replaced.
I found this website - note I'm not affiliated with them. It says replace the transmission fluid and filter every 30000 miles. They have a kit for $110 to do so. It isn't Official VW equipment though - but they say it's equivalent. I would like other's opinions please - I want to do the work myself, as a first attempt anyway.
So I s'pose want I want to know is:
1) Do you think changing the auto transmission fluid and filter is a good first step to solving this problem?
2) Do you think this kit is worthwhile and not a rip-off?
3) Other suggestions/options - am I on the right track?
Thanks in advance for any comments,