Auto Transmission Failure - Previously Intercooler Hose Identification Thread

[bluefin321]

I would also be fitting temperature gauge, making sure it doesn't overheat.

Cheers Transporter, will look into that, although we don't do any towing or carry heavy loads.

[Tornado T5]

Popped into a VW dealer I hadn't visited before to see if they had anything in stock to save on a potential new order wait and the rep mentioned quite openly that the auto in the T5's is the first thing they look at in detail while evaluating a trade-in price....

[Transporter]

Cheers Transporter, will look into that, although we don't do any towing or carry heavy loads.

Even high speed driving on 40 deg. C day can overheat the a/t and you don't have to be towing.

[bluefin321]

Guys, not sure if i'm being paranoid since the A/T was replaced a few weeks ago, but every time i drive the van i pay very close attention to the behavior of the new box, and i discovered something that doesn't feel quite right. The behavior is intermittent.

As i hit the bottom of a hill or gradual decent (in say 5th) and start to climb back up again, the gearbox should gradually shift down a gear or two, however it's going from 5th straight down to 3rd and sometimes 2nd and causing a huge over rev for a couple of seconds until it finally decides to settle back into a more suitable gear.

I've never owned a VW before, and having driven a DSG Golf for a day, i know the A/T do all sorts of weird gear changes etc, so unsure if this behavior is considered normal for a VW.

Any insights would be appreciated, like i said the box was replaced only a matter of weeks ago by a VW dealer.

[Sunny43.5]

As an owner of the same model you have and also having severe problems with the auto I can say with out doubt that what you are is experiencing is not normal . IF its a new tranny it should be operating as normal but the fact that your intercooler hose had previously blown off sounds like some engine fault that is causing the transmission to change erraticly . I saw on another thread that if the engine has some fault in the turbo boost it will cause unusual gear changes and can cause it to go into "limp"mode . I drove a Mercedes Vito many long years ago and it was the Vito,s problem exactly as you described that made me buy a VW {now look where I am at} I live at the top of a large long hill with a steep climb the Merc got halfway up and jumped from 5th down to 2 nd in one change when I let my foot of the accelerator momentarily it then jumbed back up to 5 th and almost stopped then jumped back to second with the screaming engine revs . Drove it back to the dealer with it stuck in limp mode . Any way I would take it back and complain but get them to diagnose the engine that may be the problem . Ours had never given us any problems up until some years back and its been going downhill ever since , all because of sealed for life . Don,t you just love all this modern technology that sometimes works and we love it and when it f%$#@s up we hate it with a vengance . PS I did for get one thing about the Merc it was brand new less than 1000kays as it was a demo .

[bluefin321]

The dealer told me that no fault codes were registered when the van went back for the intercooler hose and A/T replacement. I know what response i will get when i take it back... "sorry, we were unable to replicate the fault".

Might be a long shot, but perhaps software updates weren't applied after the replacement box went in?

[Sunny43.5]

If its like some of the cars I come accross these days its probably the computer that has now decided to not play along with the new transmission . I find some of the new cars if you replace even something as simple a sunroof motor {as I discovered} the car refused to talk to the new motor until the car was put onto a dealer computer and then told to play fair with the new component . I do miss the good old days !

[bluefin321]

I'm assuming the battery would have been disconnected for an extended period whilst the box was replaced, effectively resetting the ECU. Is it worthwhile resetting the transmission control module and ECU? If i disconnect the battery and press the brake pedal for 20-30 seconds to get rid of any residual charge, will this reset the ECU?

[Transporter]

I'm assuming the battery would have been disconnected for an extended period whilst the box was replaced, effectively resetting the ECU. Is it worthwhile resetting the transmission control module and ECU? If i disconnect the battery and press the brake pedal for 20-30 seconds to get rid of any residual charge, will this reset the ECU?

No. Look in my stickie, just scroll this post down to see how to reset AT 6sp http://www.vwwatercooled.org.au/foru...tml#post368688

[bluefin321]

No. Look in my stickie, just scroll this post down to see how to reset AT 6sp http://www.vwwatercooled.org.au/foru...tml#post368688

Yep, i've already got the link to reset the TCM. I also wanted to reset the ECU at the same time, which is why i was asking about the battery disconnect.