<div dir="auto"><div>Hi Roger, you say "<span style="font-family:sans-serif;font-size:12.8px">Disconnecting prop shaft to isolate diff not possible as need the inertia of the rear wheels to produce </span><span style="font-family:sans-serif;font-size:12.8px">the pulsing."</span></div><div dir="auto"><font face="sans-serif"><span style="font-size:12.8px">I think that is unlikely and would look into that more closely.</span></font></div><div dir="auto"><font face="sans-serif"><span style="font-size:12.8px">If you can get access to a "Chassis Ear" that would probably help a lot.</span></font></div><div dir="auto"><font face="sans-serif"><span style="font-size:12.8px"><br></span></font></div><div dir="auto"><font face="sans-serif"><span style="font-size:12.8px">M</span></font></div><div dir="auto"><font face="sans-serif"><span style="font-size:12.8px"><br></span></font><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Thu., Aug. 20, 2020, 1:28 p.m. Roger Grace via Healeys, <<a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div>AH people - fighting a noise in my BJ8 that may or may not be serious.</div><div>Reluctant to tear out the tranny unnecessarily and then to find it was something simple !<br></div><div> </div><div>Notice it at low speed (probably exists at driving speed but too much wind and engine <br>noise) if shift to neutral and cut ignition to minimize engine and exhaust noise.</div><div>Noise is pulsating - like a tire with a bad spot but seems to be at <br>prop shaft speed.</div><div> </div><div>At first thought that it was at wheel speed and from R side.</div><div>So changed out the R wheel bearing.</div><div>No improvement</div><div> </div><div>Then while looking below noted that universals had some play.</div><div>So changed out both universals.</div><div>Rear brakes not dragging and no binding of wheels.</div><div>No improvement.</div><div> </div><div>Did listening on hoist with others listening too. Consensus was that there was a noise at rear OD area as well as the pulsating one.</div><div><br></div><div>So pulled annulus in situ and replaced both rear bearings. Quieter but still the pulsating noise while coasting in N.</div><div> </div><div>Sound file enclosed is a road test from about 15 MPH then shift to N and cut engine. Tunnel cover off.<br></div><div><br></div><div>Able to replicate noise with engine on axle stands but not by turning a rear wheel by hand or with an e motor.<br></div><div><br></div><div>Noise does appear to come from transmission.<br></div><div><div><br></div><div>To verify is not diff removed one of the rear seats and noise doesn't appear to be coming from diff area.<br></div><div>Disconnecting prop shaft to isolate diff not possible as need the inertia of the rear wheels to produce the pulsing.</div></div><div> </div><div>About 5k miles ago I changed out the larger OD front bearing (sourced from <br>Moss ... ?) in the OD.</div><div>OD works fine and transmission shifts and works OK without unusual <br>noises.</div><div><br></div><div>The pulsating/cyclical nature of the noise baffles me and not consistent <br>with a bearing failure ?</div><div><br></div><div>Given that it occurs in neutral with no gears meshing it surely is not a bad gear tooth etc.<br></div><div>OD not engaged so it is locked so not likely there.<br></div><div>Removed gearbox top cover and did inspection - nothing obvious.<br></div><div>So to my mind this only leaves the GB rear bearing ?</div><div>Or maybe a broken circlip or thrust washer and probably on main shaft external to gearbox ?<br></div><div>or half shaft ?<br></div><div><br></div>Any comments/thoughts appreciated from the more experienced among us.<div>Tkx </div><div>rg<br></div></div></div>_______________________________________________<br>
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