[V8] Intermittent ABS light and diff locking up

[Mark Kalbskopf]

Whenever I've looked at the ABS teeth, they just seem to have the  
usual rough, dusty, slightly rusty surface, but never any major crud  
or anything.
What I really need is a magical read-out of the signals coming from  
all 4 wheels while I'm driving.
Otherwise it's a bit of a hit & miss operation, where I replace each  
sensor in turn until the problem goes away.

Mark.


On Sep 13, 2009, at 4:11 PM, qshipq at aol.com wrote:

> I've cleaned many ABS teeth, and this could definitely be the  
> problem.  On the fronts, you can pull the driveshaft out of the hub  
> enough to clean it without major dis-assembly.  I really doubt trans  
> codes will help you in any way here.  I put up a pretty nerdy post a  
> several months ago on how the center locking works on the v8, and  
> Tony described it again well.  It appears you have a diff lockup  
> signal sent from the trans ecu, caused by one of your abs sensors  
> out of whack with the others.  Fix the signal, you likely won't have  
> a problem.  As a rule, the trans ecu could care less what the actual  
> ABS sensor values are, it's only looking for the differences in  
> them.  The ABS computer on the other hand, is looking for actual  
> value *and* differences between them.
>
> HTH and my .02
>
> Scott J
> 92 v8 4.2 ABT chipped