Hi there. Not a skoda related probem this time but hope someone on here may be able to help. Son in law has a 2011 VW caddy maxi 4motion and has problems with 4x4 drive. Haldex unit has been serviced/cleaned etc as originaly thought it was the problem as fault codes pointed to it and now seems to be working but car is only sending power to rear wheels. No drive at all to front. Checked front shafts etc and they seem fine. Has anyone come accross this before. Its a 2.0TDI 2011. Mechanic says its gearbox problem but not sure as hes not used to haldex system? Gearbox is currently out of vehicle. Clutch is still ok with a bit of life left.

Any help would be welcome as its been off the road for a while and he needs it ASAP for work.

He was told its the same system as the Yeti but not sure.

Alasdair

Pretty sure the power to the rear goes via the front diff cage as per this SSP:

Therefore, it cannot be a gearbox issue. To me, the only plausible reason would be a front diff failure...

I incorrectly thought that the bevel drive was driven from the RH driveshaft, your diagram has enlightened me so thanks 👍

It means that the 4x4 system is better than I thought it was, previously I believed that drive to the rear axle would be lost if the left hand front wheel was in the air spinning freely.

The differing diameters of the bevel gears also tell me that the rear propshaft is rotating 1.5 times faster than the front driveshafts, that 7kg chunk of steel and rubber at the end of the propshaft has some serious inertia!

Will be speaking to him hopefully later and will get more info etc. Not sure which mechanic he is using. He normally does the work himself but didn't have time due to work. As said in other post they originally assumed the clutch/gearbox had gone hence the removal of the box.

Alasdair

2 hours ago, Alasdair1 said:

As said in other post they originally assumed the clutch/gearbox had gone hence the removal of the box.

Since there is drive to the rear wheels it's hard to see why they made that assumption? If the clutch/gearbox are faulty then there would be no drive to any wheels surely?

Edited 24 March24 Mar by PetrolDave

14 minutes ago, PetrolDave said:

Since there is drive to the rear wheels it's hard to see why they made that assumption? If the clutch/gearbox are faulty then there would be no drive to any wheels surely?

Did point that out but mechanic must have thought gearbox/clutch was faulty and removed it. Reckon he should be looking for a new mechanic. As said hes like me and normally does it himself but just didn't have time and the car wasn't under cover so working on it was difficult. Will be seeing him later so will get him to bring gearbox here and we can have a look. Will post what I find.

Alasdair

3 hours ago, Alasdair1 said:

Reckon he should be looking for a new mechanic.

I second that.

I sincerely hope he used the alignment pins when dropping the cross member, if not the drive problems (which are likely anything but) will be the least of your sons problems.

Thats probably not relevant, I don't know why but I was sure the vehicle was a Yeti.

Edited 24 March24 Mar by J.R.