A4 cabriolet tiptronic gearbox slipping

[gsp1253]

Hi
New to this can anyone help, I have an Audi 2004 A4 conv with a 1.8T engine. Tiptronic auto box. The gearbox oil was changed at 40k
Recently it started slipping between 1st and second gears and there is an intermittent quiet clunk when drive is engaged.
Has anyone any ideas.

[muddys]

hi pal sound like the gearbox control unit, always going faulty on the multi tronic gearbox, i had same problem on my audi a4 2.5 tdi had the gearbox control unit and input shaft replaced.Audi payed for the part as they are a common fault and i had to pay for labour.

[Dr G]

Is your car a quattro?

[gsp1253]

No its not a quattro its a 1.8T
Had a diagnostic on the gearbox today and no fault is showing. The garage reckon we should change the gearbox oil (done at 40K) the car stands at 65k at the moment and if that doesnt work then we try the ecu.

[skid-mark]

make sure they put it the proper oil and not some cheap atf oil, the level needs to be checked also when the oil is at a set temperature if it has no dipstick or level bung it will have to be checked using the vag diagnostic equiment.

[Dr G]

Can't be tiptronic then, will be multi. See this thread:

http://www.pistonheads.co.uk/gassing/topic.asp?h=0... MultiTronic Gearbox

[Tame Technician]

Define slipping????

There is no 1st and 2nd gear on a multi tronic. Unless your in manual mode.

Did it just start doing this or has it always been like that??

More input please.

[gsp1253]

when cold the gearbox doesnt slip (or I cant feel it slip) it started a month or so ago and at first did not notice it. When engaging drive there was a slight clunk and sometimes the car felt as if it moved a little but only slight. Then my wife noticed a slight shudder and when I drove it it felt like the drive slipping, over next three weeks got worse until now when driving in the lower gears the box feels as if it is slipping. On setting off the car will get to 10mph or so before a second or two of slight shudder loss of drive. Then periodically when driving but only in the lowers gears.
When you engage manual it happens around the upper end of first, second and this morning slightly into third.
I hope this helps.

[Tame Technician]

I still dont understand what you mean by the lower gears, IF your car is NOT 4 wheel drive. (1.8T can be either) then its a multi tronic box. Multi tronic boxes dont have 1st 2nd and 3rd gears etc like a normal auto, although in manual mode, it fakes it to apear as though it does.

The two commons problems with the box are.

(1) Total loss of drive, the engine revs and the car doesnt accelerate at all intermitanly, usually followed by all the gears lighting up on the dash. Normally caused by the ECU

(2) Judder on pulling away, very much like clutch judder in a manual car. Usually cause by clutch pack/input shaft assy failure.

Your description is like a bit of both. So you need to identify which it is before you continue, otherwise you'll be £1000 lighter and still have the fault.

Try doing some hill starts using about 30%-40% throttle to pull away, should bring on the judder if thats what its got.