Re: A transistorized CV Joint?

[M Connors <mconnor@frontiernet.net>]

Neil,

    You are so smart!!!  I noticed when I took the wheel off there was a
recent dig around the inside of the rim and a corresponding knick in the
corner of the caliper.  We have had some heavy snows here recently so I
discounted that as some type of stone caught in the snow pack around the rim.
Your explanation sounds very plausable, I will check this out and let you
know.  Thanks for the tip!!!  I really was thinking the only good explanation
was differential.  You made my day. Thanks again!

Best Regards

Mark

Neil Trama wrote:

> M Connors wrote:
> >
> > Hi.
> >     Picking anyone's brain out there for their thoughts.  Recently my V8
> > has started exhibiting strange behaviour when backing up.  What is
> > happening is the driver front wheel is locking up. This occurs only in
> > reverse and only after the brakes are applied.  So long as I don't touch
> > the brakes the car is fine during backup.  The minute I even slightly
> > tap the brakes, causes the driver front wheel to completely lock up and
> > stay locked (even on dry pavement).  Once this occurs the only way to
> > free up the wheel is to place the car in drive and pull ahead.  The
> > wheel then resets and is fine again.  It is interesting to note that
> > when driving forward and applying the brakes the car is fine.
> > Troubleshooting thus far has yielded the following observations:
> >
> >     1. Front Driver Brake Pads in excellent shape.
> >     2. Rotor in excellent shape with no imperfections
> >     3. When applying the brakes no pulsating (translation: no warped
> > rotors)
> >     4. ABS activated/deactivated yields same results
> >     5. No brake drag (as far as I can tell)
> >     6. Noted inner CV Joint boot torn driver's side(could this be a clue
> > ???).
> >
> > Was wondering could an inner or outer CV Joint exhibit this type of
> > locking phenomonon?  It seems that by applying the brakes induces torque
> > on the driveshaft which causes something to lock within the driveshaft
> > or differential.  It is only on this one wheel?  Has anyone seen or
> > heard of a CV Joint lock up in one direction only?   I guess the
> > alternative would be my differential? (say it isn't so....)  Any
> > thoughts on this subject would be greatly appreciated.  Thanks in
> > advance.
> >
> > Mark
> Had this happen once. 1 of the brake caliper bolts had come out. During
> forward travel the caliper tended to pull itself toward the hub
> centreline. In reverse the caliper swung out and locked against the road
> wheel.
>                                        Neil