automatic gearbox help

[mimjed 0]

Hoping for some help as I'm not clued up on auto gearboxes.

 

Audi a6 tdi sport with tiptronic box. Pretty confused by it, when you put it in drive and go to pull off the revs drop there's a small clunk and then it pulls off as normal, does this both cold and hot. Goes up and down the gears as it should and drives perfect other than this.

 

Using the sequential it does exactly as it should.

 

I've read up on what I can find, most people assume it to be low ATF. But some say it's a solenoid. And there's always the old electrical gremlins as a poss.

 

Anybody have any ideas? I'd rather catch the problem early rather than suffer later. Like i say I'm a novice at best on autos

 

Cheers jim

[floppyman 0]

You need to have it pluged in to the diagnostics... Doubt its the atf.

Might not be related to the gearbox... Maybe a engine fault

[mimjed 0]

Bad times! Hopefully I'll get to the bottom of it quicker that way

[fla 9]

yes, get it scanned it could be a stuck valve which may indeed sort itself out with a fluid and filter change. See if the valve sequencing is correct.

[mimjed 0]

well after some more reading it seems it might not be such an easy fix. many many people have had this problem and the consensus is that it only gets a hell of a lot worse.

 

althought nobody can actually seem to tell you what the problem is, people are paying for a full rebuild. not something im keen to do!

 

ive emailed audi headquaters to badger them for some answers but doubt ill get anywhere.

 

will get it hooked up on vagcom next week to see if it can spot anything.

 

cheers for replies

[floppyman 0]

Every automatic gearbox especialist will recomend a full rebuilt. You need to find the right garage to get it done. Check the fault codes and let us know.

[mimjed 0]

will certainly do that.

 

just need to wait for my odb2 lead to turn up, cant find my old one after a house move :(

 

thank you.

[Stonejag 10]

I assume no dipstick on this box?

 

Low fluid usually causes the feeling of being in neutral for slightly too long when moving off - usually the revs rise a little as you accelerate and then it slams into gear. VW claim all their gearboxes are sealed for life (a huge fib!) so it's usually quite awkward to change or top up the fluid - it also needs changing twice as lots of fluid stays in the torque converter when they're drained (unless it's a dual-clutch box in which case it hasn't got one!).

 

A stuck valve may or may not show up on the OBD - acutely low fluid can cause the clutch packs to break up and shed big lumps into the fluid which can clog the tiny hydraulic circuits in the valve body. It's usually compounded by VW's crap advice that they can't be refilled (because they want to sell you a new gearbox!) which is a pet hate of mine...

 

Usually on the later boxes there's a drain/inspection plug which overflows when the level is right - this only works with the fluid at the right temperature (70 or so, Vag-com will tell you) and with the engine running. You could try topping up or dipping to check colour - it should be clear red with no lumps or metal particles. Try not to drive it in the meantime.

 

Stone

[floppyman 0]

?!?!?!?!? All automatic gearboxes need regular oil service in vw and audi. The only ones that dont need are the new 7 speed dsg. Older dsg gearboxes have a oil filter aswell especially for servicing. Theres no oil level stick on the vw group... Theyre all checked by a overflow pipe ussualy next to the drain plug.

[mimjed 0]

Indeed no dipstick. Will be up in the air for a good clean out and filter/seal/ATF change when some one buys my bora so I get my garage back.

 

Vagcommed it today. No faults on auto box :$

 

Engine - 19463 camshaft position sensor g40, no signal... Unplugged maybe??

 

Address 08 auto hvac - note excessive com errors.

 

Central locks

01374 - alarm triggered by term 15

01370 - alarm triggered by interior monitoring

01369 - alarm triggered by hood switch

01368 - alarm triggered by luggage compartment switch.

 

Interior monitor

01349 - alarm via theft warning system front

01350 - alarm via theft warning system rear.

 

Havnt cleared them yet to see what returns but that's the lot. Nothing to give clues to the box sadly.

 

Any help much appreciated

[Stonejag 10]

?!?!?!?!? All automatic gearboxes need regular oil service in vw and audi. The only ones that dont need are the new 7 speed dsg. Older dsg gearboxes have a oil filter aswell especially for servicing. Theres no oil level stick on the vw group... Theyre all checked by a overflow pipe ussualy next to the drain plug.

It changed with the newer ones - but mine has a dipstick :) No drain plug though (might tap one in when I have a chance), you have to drain it by taking the sump off...

I was pretty sure it's in the service schedule as something ridiculous like at 50,000 mile intervals - by which time all the fluid will be long gone or burnt to a crisp. It really needs checking every couple of weeks or when you do engine oil!

 

AFAIK everything beyond the 01M is checked by the overflow method as you describe. I only know about 096es :)

 

Stone

[mimjed 0]

Yep, overflow while it's running and someone shifts through the gears is the way to tell supposedly. They take between 5.5 and 7.5 litres according to Audi forums.

 

Audi say it doesn't need changing at all and will last for the life of the engine!! My arse

[mimjed 0]

Well spoke to an auto box specialist today and he was quick to shoot down both my suggestions of input shaft or clutch pack.

 

He said if its an 01j gearbox which he believes it to be, then it's the digital input causing the problem. I assume this to mean the gearbox ecu is the cause??

 

Anyone kind enough to confirm what the box code is? OE52 XVN.

 

Hopefully getting somewhere :D