Do you happen to notice what speed this vibration
occurs? Meaning, as soon as you put it in 4th it
starts vibrating or is it at a certain speed? In
theory you could go into 4th at a low speed &
test? Does it vibrate?
What I've always experienced with out of balance tyres is
they will have certain speeds that they'll start
vibrating. Though if one of your rims has a ton of
runout you could experience vibration that won't go
away.
I'm still inclined to believe it's either that rear drive
shaft UJ or the drive shaft itself....IMHO
Cheers,
Todd
> > Jim:
> >
> > I am inclined to agree with you. The
> > issue seems to be one of two things in
> > my mind, tire balance or front wheel bearings. It
> doesn't
> > happen in third,
> > because the tires are not rotating fast enough. If it
> were
> > u-joints, I would
> > expect third and fourth to be similar, depending on
> the
> > RPMS. Also, it doesn't
> > happen in fourth going up hill because it does not
> depend
> > on throttle setting,
> > it depends on car speed, which stays flat or climbs
> very
> > slowly when going up
> > hill.
> > So here is my suggestion:
> >
> > 1. Check your front wheel bearings for
> > slop. Grab the top of the wheel with
> > both hands, place your feet against the bottom of the
> wheel
> > and lean back
> > while tugging (pretty much your full body weight). If
> you
> > feel the wheel rock
> > back and forth, then your wheel bearing is loose or
> worn
> > out. Fix this first.
> > I have found that the Bentley manual is incorrect in
> the
> > wheel bearing setup.
> > Bentley mentions something about "back off one flat"
> when
> > tightening the
> > castle nut. I feel this is just "flat" wrong
> (Har-har-har.
> > I crack myself
> > up!). Finger tighten the castle nut, but do not back
> off
> > one flat.
> > 2. Have your tires balanced WITH THE
> > TRIM RINGS ON THE WHEELS. If you don't
> > have trim rings then this is not as big a deal. My
> > experience is that tire
> > shops take the trim off to balance the wheel, then
> puts the
> > trim back on
> > ASSuming that the trim will not affect the balance.
> WRONG!
> > Ask me how I know.
> >
> > Vance Navarrette
> > Cogito Ergo Zoom
> > I think, therefore I go fast
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