<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div dir="ltr" id="yui_3_16_0_ym19_1_1536572267723_6000">The tool has several parts. One is a temporary replacement for the pinion gear and the other sits in the bearing saddles of the carrier. Both the carrier and pinion are removed to use the tool. You insert the replacement pinion, sit the other part in the saddles and with the attached dial gauge, you measure the depth of the tool. There is a lot more that goes into it but you may get the idea of how it works. Sets the depth perfect every time and then all you have to do is set the backlash and check for wear pattern with paint or Dykem Blue. Got the tool when I bought an old British car junk yard. Also have a special tool to set valve lash within .0005" using a dial gauge set-up. Not sure if they need to be that accurate for our old cars.</div><div dir="ltr" id="yui_3_16_0_ym19_1_1536572267723_6000"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1536572267723_6000">Barry</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1536572267723_6001"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1536572267723_7619" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 13px;" id="yui_3_16_0_ym19_1_1536572267723_7618"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1536572267723_7617"> <div dir="ltr" id="yui_3_16_0_ym19_1_1536572267723_7616"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1536572267723_8086"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> John Styduhar <johnstydo@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> barry rosenberg <britcars@bellsouth.net> <br><b><span style="font-weight: bold;">Cc:</span></b> Greg Blake <gblake58tr3@icloud.com>; Triumph 'Friends of Triumph <fot@autox.team.net><br> <b><span style="font-weight: bold;">Sent:</span></b> Sunday, September 9, 2018 8:06 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Fot] Fwd: Crown and pinion gear break in<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1536572267723_8087"><br><div id="yiv9040569982"><div id="yui_3_16_0_ym19_1_1536572267723_8090"><div dir="ltr" id="yui_3_16_0_ym19_1_1536572267723_8089"><div class="yiv9040569982gmail_default" style="font-size:small;" id="yui_3_16_0_ym19_1_1536572267723_8088">Barry, when you are measuring TR pinion depth, where are you measuring from and to? The TR3 manual only has the dimension from the front face of the pinion to the center of the ring gear which would be impossible to measure directly with the pinion gear installed. </div></div><div dir="ltr" id="yui_3_16_0_ym19_1_1536572267723_8092"><div class="yiv9040569982gmail_default" style="font-size:small;" id="yui_3_16_0_ym19_1_1536572267723_8091"><br clear="none"></div><div class="yiv9040569982gmail_default" style="font-size:small;" id="yui_3_16_0_ym19_1_1536572267723_8093"><br clear="none"></div></div><br clear="none"><div class="yiv9040569982yqt1346084259" id="yiv9040569982yqt42703"><div class="yiv9040569982gmail_quote" id="yui_3_16_0_ym19_1_1536572267723_8095"><div dir="ltr" id="yui_3_16_0_ym19_1_1536572267723_8094">On Sun, Sep 9, 2018 at 5:28 PM barry rosenberg <<a rel="nofollow" shape="rect" ymailto="mailto:britcars@bellsouth.net" target="_blank" href="mailto:britcars@bellsouth.net">britcars@bellsouth.net</a>> wrote:<br clear="none"></div><blockquote class="yiv9040569982gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12402"><span id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12401">There is a factory set of tools that one uses to measure pinion depth before taking a diff apart. Then you set the new pinion at the same depth plus or minus the number on the gear.</span></div><div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12404"><span><br clear="none"></span></div><div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12407"><span>Barry</span></div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817qtdSeparateBR" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12406"><br clear="none"><br clear="none"></div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yahoo_quoted" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12469" style="display:block;"> <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12468" style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"> <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12467" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12466"> <font size="2" face="Arial"> </font><hr size="1"> <b><span style="font-weight:bold;">From:</span></b> John Styduhar via Fot <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Greg Blake <<a rel="nofollow" shape="rect" ymailto="mailto:gblake58tr3@icloud.com" target="_blank" href="mailto:gblake58tr3@icloud.com">gblake58tr3@icloud.com</a>> <br clear="none"><b><span style="font-weight:bold;">Cc:</span></b> Triumph 'Friends of Triumph <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Sunday, September 9, 2018 5:12 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [Fot] Fwd: Crown and pinion gear break in<br clear="none"> </div> <div class="yiv9040569982m_1359472020569513798m_-3544020503911685817y_msg_container" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12473"><br clear="none"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12472"><div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12471"><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335gmail_default" style="font-size:small;">The "92" is the "matched set" number and should correspond with the set number on the ring gear. The other number is the difference in pinion shimming from the "normal". Haha, what is normal?</div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335gmail_default" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12470" style="font-size:small;"><br clear="none"></div></div><br clear="none"><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335gmail_quote" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12476"><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335yqt8106787341" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335yqt70545"><div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12475">On Sat, Sep 8, 2018 at 12:33 AM Greg Blake via Fot <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<br clear="none"></div><blockquote class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335gmail_quote" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12480" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12479">Ok guys and gals. <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12478"><br clear="none"></div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12487">Here is a pic of the new pinion head. What do I do with the number on the pinion head? </div><div><img id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492D0E321B3-529F-409C-BF60-3D743DEB9A62" alt="image1.jpeg" data-id="26570040-9e60-13d9-bac3-d424ab902b46"><br clear="none"></div><div>Thanks. </div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12490"><br clear="none"><br clear="none"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492AppleMailSignature">Sent from my iPhone</div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12489"><br clear="none">On Sep 7, 2018, at 1:07 PM, Bob Kramer <<a rel="nofollow" shape="rect" ymailto="mailto:rkramer56@gmail.com" target="_blank" href="mailto:rkramer56@gmail.com">rkramer56@gmail.com</a>> wrote:<br clear="none"><br clear="none"></div><blockquote id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12496" type="cite"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12495"><div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12494">I have a 4.88 ring and pinion in a box. My Triumph club is running the VTR National near Austin next year and I've been volunteered to head up the autocross. I think I'll build a diff with it and put it in the Beandito, and sell tickets! </div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335gmail_extra" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12502"><br clear="all"><div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492gmail_signature"><div dir="ltr">Bob Kramer</div></div></div>
<br clear="none"><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335gmail_quote" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12501">On Fri, Sep 7, 2018 at 8:37 AM, barry rosenberg via Fot <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>></span> wrote:<br clear="none"><blockquote class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335gmail_quote" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12500" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12499"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12498" style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12427"><span id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12426">Wasn't this the new set of gears? If so, they were new old stock from England. They once belonged to Jim Ealy, who owned a black, 1966 TR4A race car. I bought his junk yard to get his race car and the gears were new in the box. I knew him since 1973 and he had the gears then. I had them until recently. I would not think that back then there were cheap reproduction gears available. He had 4:11, the 4:55 and 4:88 (great fun but useless). The 4:11 went in the car when I sold it, the 4:88 were put in a locked diff and played with on the street; the 4:55 sat on a shelf for all those years. If the diff still had fluid in it, then it has to be improper set up, unfortunately.</span></div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12427"><span><br clear="none"></span></div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12427"><span>Barry</span></div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832qtdSeparateBR" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12440"><br clear="none"><br clear="none"></div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yahoo_quoted" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12446" style="display:block;"> <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12445" style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"> <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12444" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12443"> <font id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12442" size="2" face="Arial"> </font><hr id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_12441" size="1"> <b><span style="font-weight:bold;">From:</span></b> Greg Blake via Fot <<a rel="nofollow" shape="rect" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12509" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Fot <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>> <br clear="none"><b><span style="font-weight:bold;">Cc:</span></b> fot <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Friday, September 7, 2018 6:14 AM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [Fot] Fwd: Crown and pinion gear break in<br clear="none"> </div> <div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832y_msg_container" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13039"><br clear="none"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13040">Thanks guys for all the feedback. <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13041"><br clear="none"></div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13042">So far I have only put the car in the air and pulled the cover. There is ample evidence of excessive heat so something went wrong with my setup. </div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13043"><br clear="none"></div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13044">I might get the chance to pull it all out of the car and take some measurements on Sunday. Once I do, I’ll share my original setup notes and what I measure upon disassembly.</div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13045"><br clear="none"></div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yui_3_16_0_ym19_1_1536326086781_13046">On a related note. I ordered a new gear set from Rimmer on Monday and it arrived in Austin today, standard shipping. Amazing. Way faster than some of our domestic suppliers. </div><div><br clear="none"></div><div>This new gear set was supplied by Bastuck. Hopefully lasts a little longer. </div><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12515"><br clear="none"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712AppleMailSignature">Sent from my iPhone</div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712yqt3328800303" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712yqt60981"><div><br clear="none">On Sep 6, 2018, at 7:41 AM, Rick Parent via Fot <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<br clear="none"><br clear="none"></div><blockquote id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12523" type="cite"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12522"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12521" style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712yui_3_16_0_ym19_1_1536237470748_10096"><span id="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712yui_3_16_0_ym19_1_1536237470748_10136">Looks like the pinion was way to deep.</span></div> <div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712yahoo_quoted" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12520" style="display:block;"> <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12519" style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"> <div id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12518" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"><font size="2" face="Arial"> On Thursday, September 6, 2018 6:38 AM, Bill via Fot <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv9040569982m_1359472020569513798m_-3544020503911685817yiv0604855335m_-3671314450992527492m_-6928659416193145832yiv8608138712y_msg_container" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12517"><div dir="ltr" id="yiv9040569982m_1359472020569513798m_-3544020503911685817yui_3_16_0_ym19_1_1536526013624_12516">I doubt if a break-in procedure could have prevented failure, but as Marcel says, checking the temperature of the diff could have stopped the damage. The likely culprits are incorrect engagement or bad parts, but anything that heats the gears enough to cook the oil off the parts will kill the gears. I had a close call with one of the gear sets I use. Apparently I screwed up somewhere in checking fit—when I pulled the rear end to assess the problem there was no backlash. I have a huge finned differential cover so checking temperature doesn’t help, but I could feel the car slowing quickly between shifts. Fortunately I wasn’t doing my usual clutchless shifts and noticed the sudden deceleration every time I disengaged the clutch. The gear teeth were slightly blued and the oil smelled like a cesspool, but the gears were still usable once I did the setup properly. <br clear="none"><br clear="none">Bill<br clear="none"> <br clear="none">> On Sep 5, 2018, at 1:48 AM, van.mulders.marcel--- via Fot <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> ----- Doorgestuurd bericht -----<br clear="none">> Van: "van mulders marcel" <<a rel="nofollow" shape="rect" ymailto="mailto:van.mulders.marcel@telenet.be" target="_blank" href="mailto:van.mulders.marcel@telenet.be">van.mulders.marcel@telenet.be</a>><br clear="none">> Aan: "Greg Blake" <<a rel="nofollow" shape="rect" ymailto="mailto:gblake58tr3@icloud.com" target="_blank" href="mailto:gblake58tr3@icloud.com">gblake58tr3@icloud.com</a>><br clear="none">> Verzonden: Woensdag 5 september 2018 10:47:59<br clear="none">> Onderwerp: Re: [Fot] Crown and pinion gear break in<br clear="none">> <br clear="none">> I think it is good measure to check the heat of the differential casing after a few laps when the pinion and crownwheel are freshly mounted : when the casing gets very hot, something is wrong : or the parts are bad or they are mounted not correctly<br clear="none">> There are at least 2 manufactures of the TR parts, I forgot about the names. As far as I know, used original parts are running cooler than some of the aftermarked parts. How was the noise of the diff? Did you notice the smell during the first laps?<br clear="none">> Marcel<br clear="none">> <br clear="none">> ----- Oorspronkelijk bericht -----<br clear="none">> Van: "fot" <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br clear="none">> Aan: "fot" <<a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br clear="none">> Verzonden: Woensdag 5 september 2018 03:25:39<br clear="none">> Onderwerp: [Fot] Crown and pinion gear break in<br clear="none">> <br clear="none">> I would love to here the FOT experience in breaking in new differential gears. What has worked well for you in the past? <br clear="none">> <br clear="none">> Last weekend, I was running the TR3 at Hallett with a brand new 4.55 gear set and it failed. I probably got 30 laps total in 4 sessions on track. I did not think to follow any set break in procedure with the gears and I am wondering if that is why they failed. <br clear="none">> <br clear="none">> I am interested in the lists experience with brand new or new old stock ring and pinion break in. <br clear="none">> <br clear="none">> Here is a pic of the failed set. <br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> [image/jpeg:image1.jpeg]<br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> Sent from my iPhone<br clear="none">> _______________________________________________<br clear="none">> <a rel="nofollow" shape="rect" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a><br clear="none">> <br clear="none">> <a rel="nofollow" shape="rect" target="_blank" href="http://www.fot-racing.com/">http://www.fot-racing.com</a><br clear="none">> <br clear="none">> Donate: <a rel="nofollow" shape="rect" target="_blank" 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