[urq] Driveline whine......

Louis-Alain Richard laraa at sympatico.ca
Mon Nov 2 16:46:23 PST 2009

So, I've got the alternator mounted back in place, and with consistent
voltage, my car seems to be starting and running well.  Interestingly, my
battery had run down to the point of needing a jump start while the
alternator was just hanging with a loose belt, and while the jump pack was
attached to the battery, the car would idle fine, however, when I detached
it, it would stumble and want to die.  It occured to me that the running
issues I had earlier this summer could have been attributed to inconsistent
voltage coming from the alternator due to a loose belt.  Any thoughts?

******I've learned to never rule out a slightly loose belt... Alternator are
very hard to spin when load goes up : 90 amps at 14 volts, that is  1260
watts, or about 1.7 hp. Ever tried to stop a 1.7 hp electric motor ? Tighten
that belt enough so you can't twist it 1/4 turn along the longest part.

On a different note.......took her out for a somewhat spirited drive
yesterday and I seem to be getting a fair amount of driveline noise, coming
from the front right mostly, but could be both sides or under the car.  More
noticable from inside the car than outside (had someone drive by me.)
Sounds are dependent on vehicle speed, not engine speed.  Happening in all
gears, and changes pitch with speed.  Seems to be numerous "jet aircraft
taking off" sounds.  Fairly inconsistent, but "always there" if you know
what I mean.  The brakes don't seem to be dragging (no excessive heat
buildup) and no cv boot leaks.  Before I dive underneath, any thoughts on
where to look? I seem to remember now that someone mentioned maybe something
with the driveshaft, but can't find the post.  Any help?  Anyting in
particular to look for if it could be the driveshaft?

****** Center shaft bearing is a likely culprit, as well as the u-joint, but
a bad bearing in the gearbox will make that kind of noise too. Brady's UrQ
show that noise in 2nd and 4th gear, but not in the other gears. Also could
be your parking brake cable "equalizer" that rubs on the driveshaft...


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