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Drivetrain rumbling noise
Recently, I have noticed a rumbling noise coming from the front
drivetrain (88 5ksq). The noise seems to be coming from both sides.
Initially, I suspected the wheel bearings. However, I was not entirely
convinced that it was them as I it is unlikely that both bearings would
give out simultaneously. Moreover, I do not hear
"wwwwaaaaaawwwwaaaaaaawwaaaa" when going straight or when cornering.
Futhermore, inspection of the wheels shows no play top-to-bottom or
side-to-side in the bearing what so ever.
What I do hear after driving for a few miles is a constant rumbling
noise thay does not change when cornering. It only gets louder the
further/ longer I drive.
Last Saturday, I went under the car to look for the source of the noise.
I discovered that:
a. the left driveshaft has more play at the CV jonts than the right, and
b. the left driveshaft flange where it joins the inner CV joint has some
side-to-side play in and out of the gear box.
1. Could worn CV joints give me the rumbling noise? Eventhough, threre
seems to be no slack upon accelerantion/ deceleration?
2. Is the side-to-side play of the driveshaft flange from the gearbox
indicative of a shot differential bearing or worse, the whole final
drive/ gearbox? ---and this is the real source of the rumbling noise?