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<div dir="ltr" data-setdir="false">I have used a 4.3 at LRP for years in my TR3. I have a 7300 redline and a 5 spd transmission with a .81 5th gear. Only use 5th on the main straight. Back in the late 70's many of the TR3/4 racers would use a 4.54 diff with the TR OD trans. </div><div dir="ltr" data-setdir="false">JoeB</div><div><br></div>
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On Monday, June 2, 2025 at 12:58:04 PM EDT, Dave Riddle via Fot <fot@autox.team.net> wrote:
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<p class="ydp1d419f95yiv5806408202MsoNormal"><span style="font-size:11.0pt;">Lime Rock is a high speed Track so does the collective FOT wisdom think a 3.7 or 4.1 rear end would be best in a TR4?</span></p>
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<p class="ydp1d419f95yiv5806408202MsoNormal"><a href="http://www.microworks.net/" rel="nofollow" target="_blank"><span style="font-size:11.0pt;color:blue;text-decoration:none;"><img border="0" style="width: 191px; max-width: 191px;" id="ydp1d419f95yiv5806408202Picture_x0020_1" src="cid:f7TKqQYcpK6EdkFwVIcE" alt="MWLOGO-Signature" data-inlineimagemanipulating="true"></span></a><span style="font-size:11.0pt;"></span></p>
<p class="ydp1d419f95yiv5806408202MsoNormal"><b>Dave Riddle</b></p>
<p class="ydp1d419f95yiv5806408202MsoNormal"><span style="font-size:11.0pt;">Business IT Consulting</span></p>
<p class="ydp1d419f95yiv5806408202MsoNormal"><span style="font-size:11.0pt;">Office: 480.610.8234</span></p>
<p class="ydp1d419f95yiv5806408202MsoNormal"><span style="font-size:11.0pt;">Cell: 602.692.5276</span></p>
<p class="ydp1d419f95yiv5806408202MsoNormal"><span style="font-size:11.0pt;">eMail: <a href="mailto:dave@microworks.net" rel="nofollow" target="_blank">
<span style="color:blue;">dave@microworks.net</span></a></span></p>
<p class="ydp1d419f95yiv5806408202MsoNormal"><span style="font-size:11.0pt;">Website: <a href="http://www.microworks.net/" rel="nofollow" target="_blank">
<span style="color:blue;">http://www.microworks.net</span></a></span></p>
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