<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Sounds really interesting. As I recall, the drive shafts shear at the point where the splined shaft enters the differential wheel. Would the shot peening damage the splines on the shaft?<div><br></div><div>Dermot Harvey</div><div><br><div><div>On Mar 3, 2015, at 4:57 PM, Fletcher Millmore via Rovernet wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Look into other treatments - stress relief, cryo, peening all help, especially in combination. See Metal Improvement company etc. Much of this stuff was first done by SoCal hotrodders so they could abuse final drives - ie putting 1000hp through a 40's Ford axle.<br><br>FRM<br><br>On 3/3/2015 4:34 PM, Scruggs Family via Rovernet wrote:<br><blockquote type="cite">Ah, thanks, Vern... I'd forgotten about those things. I suppose it<br></blockquote><blockquote type="cite">wouldn't be too difficult to have a good set of 2000 axles shot peened...<br></blockquote><blockquote type="cite">which reduces the likelihood of surface cracks. Never had that problem but<br></blockquote><blockquote type="cite">have had the differential mounting bracket develop stress cracks.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Said the one-armed alligator wrestler, "We learn as we go."<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Gross<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">-----Original Message-----<br></blockquote><blockquote type="cite">From: Vern Klukas [mailto:vern@inkspotco.com]<br></blockquote><blockquote type="cite">Sent: Tuesday, March 3, 2015 4:13 PM<br></blockquote><blockquote type="cite">To: Scruggs Family; Rovernet<br></blockquote><blockquote type="cite">Subject: Re: [Rovernet] P6 final drive<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Dermot meant what I would call the stub axles on the diff that the half<br></blockquote><blockquote type="cite">shafts bolt to. Rover calls them drive shafts.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Yours<br></blockquote><blockquote type="cite">Vern<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><blockquote type="cite">On Mar 3, 2015, at 1:02 PM, Scruggs Family via Rovernet<br></blockquote></blockquote><blockquote type="cite"><<a href="mailto:rovernet@rovernet.org">rovernet@rovernet.org</a>> wrote:<br></blockquote><blockquote type="cite"><blockquote type="cite">Dermot,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Clarification please... you said "drive shafts"... did you mean to specify<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">"half shafts?" Was there a common point at which these failures took<br></blockquote></blockquote><blockquote type="cite">place?<br></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Thanks,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Gross Scruggs<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Annapolis, MD<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">-----Original Message-----<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">From: Rovernet [mailto:rovernet-bounces@rovernet.org] On Behalf Of Dermot<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Harvey via Rovernet<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Sent: Tuesday, March 3, 2015 1:19 PM<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">To: <a href="mailto:Rovernet@rovernet.org">Rovernet@rovernet.org</a><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Subject: [Rovernet] P6 final drive<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">There is another factor with P6 final drive - the differential drive<br></blockquote></blockquote><blockquote type="cite">shafts<br></blockquote><blockquote type="cite"><blockquote type="cite">are different! The 3500S drive shafts are shot peened which is supposed to<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">make them stronger. I think these drive shafts are a weak point in the<br></blockquote></blockquote><blockquote type="cite">rear<br></blockquote><blockquote type="cite"><blockquote type="cite">end. I had a 3500S once where the drive shaft completely sheared leaving<br></blockquote></blockquote><blockquote type="cite">me<br></blockquote><blockquote type="cite"><blockquote type="cite">stranded. I like to take these drive shafts out and see how 'upset' the<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">splines are before using or selling a rear end. I have seen quite a few<br></blockquote></blockquote><blockquote type="cite">that<br></blockquote><blockquote type="cite"><blockquote type="cite">are well on their way to twisting off!<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Thank you David Walter for the harmonic balancer info.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Dermot Harvey<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Spectral Kinetics<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">-------------- next part --------------<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">An HTML attachment was scrubbed...<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">URL:<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><<a href="http://rovernet.org/pipermail/rovernet_rovernet.org/attachments/20150303/fb">http://rovernet.org/pipermail/rovernet_rovernet.org/attachments/20150303/fb</a><br></blockquote><blockquote type="cite"><blockquote type="cite">d3b25e/attachment.html><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">_______________________________________________<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Rovernet mailing list<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><a href="mailto:Rovernet@rovernet.org">Rovernet@rovernet.org</a><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><a href="http://rovernet.org/mailman/listinfo/rovernet_rovernet.org">http://rovernet.org/mailman/listinfo/rovernet_rovernet.org</a><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">_______________________________________________<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Rovernet mailing list<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><a href="mailto:Rovernet@rovernet.org">Rovernet@rovernet.org</a><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><a href="http://rovernet.org/mailman/listinfo/rovernet_rovernet.org">http://rovernet.org/mailman/listinfo/rovernet_rovernet.org</a><br></blockquote></blockquote><blockquote type="cite">Inkspot Type & Design<span class="Apple-tab-span" style="white-space:pre"> </span>250 864 5619<span class="Apple-tab-span" style="white-space:pre"> </span><a href="mailto:in@inkspotco.com">in@inkspotco.com</a><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">_______________________________________________<br></blockquote><blockquote type="cite">Rovernet mailing list<br></blockquote><blockquote type="cite"><a href="mailto:Rovernet@rovernet.org">Rovernet@rovernet.org</a><br></blockquote><blockquote type="cite"><a href="http://rovernet.org/mailman/listinfo/rovernet_rovernet.org">http://rovernet.org/mailman/listinfo/rovernet_rovernet.org</a><br></blockquote><blockquote type="cite"><br></blockquote><br><br>_______________________________________________<br>Rovernet mailing list<br><a href="mailto:Rovernet@rovernet.org">Rovernet@rovernet.org</a><br>http://rovernet.org/mailman/listinfo/rovernet_rovernet.org<br></div></blockquote></div><br></div></body></html>