zf auto just stoped

[worraps]

:confused:hey guys hope you all had a great and happy xmas/newyears.
Mine was full of dramas final straw being my disco.

Now what happend was driving back from tara on highway doing about
95kmh next thing i know is revs are up around 3200 rpm and i have no drive. So i pulled over checked the fluid level in the auto seemed to be full
slid underneath checked for broken drive shafts they we ok. Next i changed to low range made no difference locked teh centre made no difference.there were no loud bangs no crunches no grinds just nothing
300km trip back on a tow truck and a shuffle of people and dogs into other cars big pain in teh ass.

So now my question is where and what do i start looking at first
As i have next to no idea's about auto's. So any pointers as what to check first and what possible causes could have made this happen
i am expecting the worst ie rebuild/secondhand box but i am hoping it's
not that serious. any and all help is greatly apreciated as always guys :)



thanks
worraps

[davros]

On my 2000 td5 disco i tore out the flex plate, which is like the flywheel on a manual, but lighter as the weight of the torque converter makes up for it. Could be that? Also check that it is actually in gear. Have a look to make sure any dash indicators show the same gear as the selector, and check the cable that activates the selector on the side of the gearbox is workin. Also check the transfer case lever feels normal, that it has not jumped into neutral somehow, or a connection is stuffed.
If you put it in park, can the vehicle roll? This would indicate a fault "downstream" of the park lock, some kind of breakage or disconection. If it's all locked up properly but releases in "n" then I guess its "upstream" of this mechanism, ie not in the transfer case. If u suspect the transfer case has a fault, it may well be the input to it from the zf has stuffed splines I believe, someone posted some pics of this on a defender recently i seem to recall.

Dave

Here's the link...

http://www.aulro.com/afvb/technical-chatter/47792-went-bang.html

[Blknight.aus]

with it making no effort and not making any noises Id be leaning towards a selection failure.

having not pulled the auto off of the back of the td5 (yet) If its an electronically controled one it could be as simple as a blown fuse for the electronics.

but

why did the fuse blow. Assuming the electronics (if fitted) are ok

If your lucky a flush out will fix it but I dont hold high hopes for that.

If the primary clutch pack or gearset has let go its time for a rebuild.

[p38arover]

Being a '96 Tdi, it won't be electronically controlled.

It could be the flex plate (I've broken 2 on my V8). It's easy to check. Pull off the small circular cover from the bottom of the bellhousing and see if the torque converter can be rotated easily. It shouldn't move at all if the flex plate is solid. Or start the engine and see if the torque converter is spinning.

Having said that, neither of my flex plate failures resulted in loss of drive.

BTW, did you try reverse gear?

[Grizzly_Adams]

As blknight.aus said, it could be as simple as selection failure.

Try taking the middle of the top off your in-cab selector (needs a screwdriver). In there is a bar with a little split-pin. If that split-pin falls out for any reason = no drive.

Been there, done that - was embarrassed about how easy a fix it was :angel: Hopefully yours is the same.

[Blknight.aus]

Being a '96 Tdi, it won't be electronically controlled.

It could be the flex plate (I've broken 2 on my V8). It's easy to check. Pull off the small circular cover from the bottom of the bellhousing and see if the torque converter can be rotated easily. It shouldn't move at all if the flex plate is solid. Or start the engine and see if the torque converter is spinning.

Having said that, neither of my flex plate failures resulted in loss of drive.

BTW, did you try reverse gear?

I should stop posting before my coffee....

I re-read the details from davros's post about the td5....

with that out of the equation...

if it stopped while driving its an internal problem. I would have thought that it would have stayed in the gear it was in if the connecting pins had come out of the selector.... Hope Im wrong tho.

[Diff]

Our 96 TDi auto did a similar thing after we were rear ended in an accident. Drove for another 800mm then no drive in any gear and no mechanical noises to point out a failure. After three weeks and a stripdown of the gearbox the sent the torque convetor away to be split. It was stuffed

The auto shop said that as the convetors wear out the inpellors become thin. The impact must have been enough to break them. It was another shop that cut the convetor and they said they had seen it befor in ZF gearboxes.

Hope this helps.

[mcrover]

When the Drive plates break then the 300TDI's vibrate to the crap house and make lots of nasty noises so I would say that that is unlikely.

Converter normally causes vibrations as well but is probably more likely.

I would be inclined to think that it may have gone to kick down or change up and one of the spool valves has got stuck and given it a drop in pressure thus no drive.

Or

It could have broken a main pump or pump drive/ drive shaft.

These could both be diagnosed with a main line pressure test.

[worraps]

hey guys and thanks i will pull the plate off and check teh toque converter for play first as it sounds easiest. at the time i was traveling at 95kmh on highway and then the gearbox just had nothing no noises no drive i checked it was in gear transfer was in high swaped to low no difference locked teh centre no difference and yeah it 96 tdi so nothing electrical (i wish it was just a fuse lol) will keep u updated


worraps

[worraps]

Converter normally causes vibrations as well but is probably more likely.

I would be inclined to think that it may have gone to kick down or change up and one of the spool valves has got stuck and given it a drop in pressure thus no drive.

.

i remember reading somewhere that if kickdown cable snaps it also causes a loss in preasure can anybody confirm this if so i will check that also failing the simple tests i can do at home i guess it will be box out and sent away to be checked and fixed


worraps

[Blknight.aus]

it does but it doesnt prevent all drive it just wont change out of first very easily

[jimbo110]

Stripped spline on the transfer case input gear?

[mcrover]

i remember reading somewhere that if kickdown cable snaps it also causes a loss in preasure can anybody confirm this if so i will check that also failing the simple tests i can do at home i guess it will be box out and sent away to be checked and fixed


worraps


If the KD cable breaks it still changes up ok but wont kick down but what it does is it drops line pressure which causes the clutchs to slip under load.

This over time can cause premature wear on the clutch packs, case breaks and sprags and will casue the trans to fail if not sorted relatively quickly.

It deffinatly wont stop the car but will cause things to wear that will.

[sclarke]

McRover.
Honest question and not a Dig.

You answer alot of questions on the ZF's
so you have some knowledge... Are they that much of a drama?
Before i fit my ZF, should i think about a Ranger 3 speed for the County?

Where do you find out all this info?

Steve

[Blknight.aus]

jsut to see if I can second guess MC rover.

The Zf is your auto box of choice for the rover but make sure you get the one thats setup for your engine as the mapping and internals are slightly different.

[sclarke]

jsut to see if I can second guess MC rover.

The Zf is your auto box of choice for the rover but make sure you get the one thats setup for your engine as the mapping and internals are slightly different.

Yep, its from a 3.9 that will end up in my car..