Weird Noise From Zf

[hypnodoc]

For a few months now, when I give the car a bit in either auto or sports mode when the box changes from 2nd to 3rd and from 3rd to 4th it make a very fast (about 1 second) and noise as it changes that can best be described as sounding like "whhhhhhoooooooooooooop" in a high pitch.

Ford shrug thier intelligent shoulders and the box is changing fine, no slipping etc. Any ideas or previous experiences with the same in a zf would be appreciated?

[R-SPEC]

Oh oh! ZF's are expensive Rick!

[Phoontastic]

  hypnodoc said:

For a few months now, when I give the car a bit in either auto or sports mode when the box changes from 2nd to 3rd and from 3rd to 4th it make a very fast (about 1 second) and noise as it changes that can best be described as sounding like "whhhhhhoooooooooooooop" in a high pitch.

Ford shrug thier intelligent shoulders and the box is changing fine, no slipping etc. Any ideas or previous experiences with the same in a zf would be appreciated?

You and me both. Mine has been making a very similar noise for about 6 months, but only on the 3-4 change. This change is a fair bit slower than the other changes, and that makes me feel as though it is slipping. In the spirit of fault finding we changed the oil to Transmax Z, which firmed up the changes a bit, but the box now has the characteristic that when you give it a big hit it lets go at high revs which sends a big shock through the driveline and scares the crepe out of ya. Feels like you've driven over a log!!

It makes me wonder whether the change in oil has exposed the problem of worn clutch packs, turning the whooop noise into instant let go under load. I'm no expert in autos so any advice from the gurus would be appreciated. And yes, I expect it will be expensive to fix, but the ZF is such a good box it is worth it. If anyone has had their ZF modified or beefed up I'd appreciate their views too.

[hypnodoc]

Hmmmmm, interesting Phoontastic. When mine had done about 8000ks I gave it a hard run and when it was changing from 4th to 5th flat out it made a sound like someone had hit the boot floor with a sledgehammer, all the bushes in the suspension and diff and driveshaft were fine and it never did it again, very weird. My car gets driven more fast than hard if its put to work, the ocsasional flat out run up to high speed and then back off but I don't thrash it through gears in sports mode or do burnouts etc. I would be very disappointed if a ZF gave upo easily.

[JBJARROD]

Hi mate, I have finally found someone with the same problem as me.

Unfortunately I don't have a confirmed fix regarding this noise that you are talking about.

I'm planning on replacing the oil (doing a full gearbox flush and replacing the 9 litre) with Penrite oil (not sure what exact oil just yet). I have read elsewhere of a similar noise and they have fixed the problem by changing the oil (doing a service).

I am running 341rwkws since this noise and I have 64,000kms on the odometer. Pretty sure it hasn't had an oil change yet so that is next on the cards.

Im hoping that I wont have to rebuild the gearbox cause that will mean around $5000 bucks ahhh (already got quotes through CV Performance).

Anyway mate I will let you know how I go but I hope that I fix this issue without having to the do the rebuild.

If you hear anything or find a fix let me know please

Cheers

Jarrod