Check both driveshaft flex disks and also make sure that the axle shaft boots
are not torn as a worn hemi-axle shaft can make a loud thumping noise that
starts after about 20 min of driving.
Sent from my iPhone
On Jul 15, 2009, at 8:23 PM, OK Don <okd...@gmail.com> wrote:
Perhaps the drive shaft center bearing?
On Wed, Jul 15, 2009 at 3:55 PM, Fmiser <fmi...@gmail.com> wrote:
Troubleshooting challenge!
The car: 1985 W123 300TD (wagon)
The problem: A noise that sounds a lot like a noisy,
big-lugged tire. It is faster than a tire-speed
noise, so it's not a stone in the tire, etc.
Details: The noise showed up a 1500 miles ago - very faint.
I didn't worry about it. About 200 miles ago it started
getting louder.
Neither my passengers nor I could hear the sound outside the
car. (running next to the car or hanging out the window).
The sound quits when the brakes are moderately
applied. (moderate meaning. "a bit brisker than I usually use
to approach a known stop sign, not not so agressive it
startles any of my passengers")
The sound quits when making a moderate right turn. Seems to be
g-load rather than steering angle related, but I'm not sure.
I put the car on blocks so the back wheels where off the
ground. I did not hear the sound.
I looked at the front right (starboard) outer wheel
bearing. It look okay, but I was in a hotel parking lot so I
didn't look super closely.
Any clever ideas where to dig next?
Because it didn't show up when the back wheel where off the
ground _and_ it is influenced by braking and turning, I'm
thinking it has to be at the wheels....
Maybe?
-- Philip
--
OK Don
Pair of W124 300D 2.5 Turbos
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