And check the wheel flange nut...
Glen
--Previous Message--
: Well just a few random thoughts, others
: may add to it.
: I would check the basics first, check
: the outer hub bearings and make sure
: there is fluid in the diff.
: Any howling on/off throttle?
: Lean on it hard in left/right turns,
: any difference in noise?
: Is it RPM sensitive? Engine speed? Axle
: speed?
: Any "clunk" from rear?
: One of the problems with these is that
: there is no provision to drain the
: units, so they never get properly
: serviced, and there is no way to get a
: good low-point sample from them.
: If the ring & pinion don't have a
: lot of perceptible lash, and there is
: no howling going on, it's probably OK.
: If the R&P or carrier bearings fail,
: the gears will go out of mesh and it
: will make noise, and there may be
: excessive leakage from the pinion seal.
: This is where you can get in trouble
: because replacements will have to be
: set up for proper mesh and preload.
: This procedure varies slightly
: depending on whether the unit has
: shimmed or collapsible spacer for
: preload, but it is a bit involved,
: although not terribly complicated if
: you understand it.
: The differential gears themselves are a
: problem area, the thrust washers get
: beat to hell and the axle/spyder gears
: get a lot of lash, this will give you a
: clunk.
: Driveshaft u-joint & balance issues
: are another source of harmonics.
: The stub axle bearings are serviceable
: independent from the diff unit.
: Outer hub wheel bearings, since you
: have replaced them already you know
: that's fairly straightforward, if you
: can get the wheel flange off (!), but
: the potential problem is with the inner
: needle bearing riding directly on the
: axle shaft/journal. Any pitting in the
: surface will eat the new bearings.
: Try to narrow it down a little, it's
: most likely something you can sort out
: yourself.
: If it turns out to be in the diff
: itself, you may have the option of
: building up your spare and then just
: doing a swap. A partial teardown will
: be necessary to do a proper inspection.
: Glen
:
:
: --Previous Message--
: With the oil pressure in the 1500 issue
: at a point where nothing more can be
: done I am planning on addressing other
: problems.
:
: When test driving the car after the
: engine went in I found it hit a
: horrible resonance at 50 MPH and made
: loud roaring noises from the rear. At
: lower speeds there is a definite speed
: dependent "whoosh, whoosh,
: whoosh" noise. I replaced wheel
: bearings a couple of years ago and
: would like to think that they have not
: worn out with the limited use my son
: has given the car. My suspicion is the
: differential.
:
: Can you suggests tests or things to
: listen for that would indicate a
: failing rear end?
:
: If it is the differential, I have a
: spare that came with a parts car but
: its condition is unknown. Reading
: Bentley, it sounds nearly impossible to
: rebuild one at home but perhaps some of
: the bearings can be replaced. Are
: there online resources that are
: better/simpler than Bentley that can
: walk me through a reconditioning
: process if not a full rebuild?
:
: I may not need to do anything but I am
: curious if this is an area that I
: really do have to leave for a pro.
:
: Doug L.
:
:
:
:
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