Strange pròblem - rear wheel binding

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Originally Posted by l00kin4

I have experienced an intermittent issue like this on the front. Wheel sensor was what the dealer thought. TC kicks in 'cos it thinks the wheel isn't turning.

It first started happening after driving through a lot of mud and water. They cleaned the sensor and it improved dramatically (it hasn't completely gone away but as I haven't been able to demonstrate to the service guys they don't want to address it...)

David

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Hi David. Interesting and thanks. Do you mean that the wheel sensor senses that wheel is turning far faster than the opposite wheel on the same axle and brakes the 'spinning' wheel?

Cheers

I guess it's possible if crud is stopping the signal from OPPOSITE wheel, then the wheel that's 'binding' might be perceived in comparison to the other as 'slipping' and thus is being intermittently braked.

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Originally Posted by ozscott

Hi David. Interesting and thanks. Do you mean that the wheel sensor senses that wheel is turning far faster than the opposite wheel on the same axle and brakes the 'spinning' wheel?

Cheers

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Originally Posted by DiscoJeffster

I guess it's possible if crud is stopping the signal from OPPOSITE wheel, then the wheel that's 'binding' might be perceived in comparison to the other as 'slipping' and thus is being intermittently braked.

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Yes, that would make sense to me. fyi mine is still not fixed but as it doesn't happen very often I can't demonstrate to the dealer haven't had any luck getting if looked at. In my research on this another related issue to this can be if wheel bearings are worn/loose this can also affect the sensor operation and cause the same problem.

David

As per other comment on here - I had a similar issue after going thru Nolan's Brook (deep water crossing).
Long story short, it was a transfer case issue. I had mine replaced, but is more likely just to be a calibration issue in the transfer case.
Need a GAP iidTool or similar, and need to do a recalibration of the transfer case (not sure of procedure).

There is a thread on here from my issue (2014), and also recently (a couple of months back) when someone else had a similar issue.
Hope it's a straight-forward fix for him...

Thanks.

Rob

Just an update guys. The mechanics reset the box on the computer within 2 mins so no more locking of the CDL and wind up causing rear wheel problems...however the vehicle had 100000 on it when my mate got it and he immediately put on a serviceable pan and did the auto fluid. The wind up appears to have caused a problem (or broke the camel's back) with the box. They say it's shuddering and they found filings in the oil. They are testing further with an additive. They reckon it's either the torque converter ($2500) or box ($8000).

These ZF's are a pain and really an Achilles heel if not serviced from early on.

Cheers

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Originally Posted by discorevy

It's also possible he'll have water in the connecters to the transfer case , does he have a gap iid tool or other diagnostics? , he may need to recalibrate the tc .

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Sounds exactly like the problem I had earlier this year after driving through some deep water during local flooding in Kalgoorlie. Buggered if we could find any sign of water in any of the plugs / connectors, though we did not pull out the connectors from the computer / control unit under the bonnet, as I did not think that water could have got this high. The symptoms that ozscott is reporting are identical to those that I experienced. Calibration of the TC using the IID tool fixed the problem, and it has not returned since. [wink11]

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Originally Posted by Disco-tastic

AFAIK The transfer case doesn't fully lock, it transmits up to 90/10 either direction, so it shouldnt bind up.

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I can assure you that the transfer case DOES bind up. [wink11]

Nice one Mal. You must service your auto at 40k klm intervals? It's the one downside to d3/4 as a second hand purchase unless you are confident that the owner fitted the pan and serviced the auto at least as early as 40000 or earlier if towing. I think my mates D3 towed (...the Tekonsha have it away...)..Cheers

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Originally Posted by ozscott

Nice one Mal. You must service your auto at 40k klm intervals? It's the one downside to d3/4 as a second hand purchase unless you are confident that the owner fitted the pan and serviced the auto at least as early as 40000 or earlier if towing. I think my mates D3 towed (...the Tekonsha have it away...)..Cheers

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Dude. Transfer case and auto trans are two totally separate things. The auto is not a factor in the binding issue. If you're having an auto trans issue related to the original issue I'm seriously confused?

As for the auto, the manufacturer recommends 100,000km so not sure why you think it needs a service every 40,000km?

Oh, and my auto trans was not serviced until 220,000km and is fine, so it clearly comes down to whether it's had a hard life (regular heavy towing etc)

Thanks for educating me on the fact that the auto trans and transfer case are different...wish I knew that when I started driving 4wds 30 years ago.

As for the ZF auto they are a shocker and failure is common when not modified for easy servicing. Just search this site. You would be very lucky indeed to get to 200k on 1 service particularly towing...

From what I can tell 70000 is about as long as you would want to leave it and if towing I would personally so it at less kilometres than that. From memory JustinC wrote up his observations on the ZF and GM boxes in D3\4, Range Rovers. Can't find it at the moment but it was a good thread.
I wouldn't doubt that diff wind up can place strain on the gearbox particularly in the strain off offroading in Cape York.

Cheers