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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For the longest time, it really seems like decades, oh hold on 15yrs ( really long story, a long boring story ). I have been searching for a replacement gearbox for the spitsix. Namely the gearset and main case. Well, a number of weeks
ago I picked up a MKIV-non-OD gearbox. Pristine shape. Yesterday, got ahold of a MKII GT6 ( KC series ) and today got another MKII GT6, again KC series.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Looking at all these parts etc and now I have a bazzilion questions, first the points I know<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo1">I know the input shaft is matched to the depth of the bell house and has less but thicker splines. All good<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo1">I know that the input/first gear of the GT6 box is a different ratio than a spitfire. I can scream a GT6 in first for a while ( younger year stunt, but still sounded cool )<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo1">The input gear has a different number of teeth than the MKIV <o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo1">The mainshaft for the OD is different, I need to get one of those still to attach my OD unit.<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Nowwwww, for the questions <o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">The GT6 box is considered “weak”, I know the needle bearings on the laygear are generally crap and that Quantum will put bushings in ( we will come to that )<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">What is the mechainical difference of the MKII ( KC ) and the MKIII ( KF ), is there any in reality that make a difference?<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">The laygears look exactyl the same between the MKIV and the MKII, are they really the same?<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">With the stated diffference of the input and first gear, what are the differences in the spit MKIV and gt6 MKII/III? Again visually they look the same<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">In the end, what can I mix and match? does it matter? Is it OMG don’t do this?<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">Can the bushings on the laygear, can anyone with a machine shop do this? I john at Quantum still doing this?
<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">Has anyone replaced the needle bearings with roller bearings? Or not strong enough?<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I need to be educated by the masters of this list. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">David Templeton<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">’59 tr3a – damn she is fast and wonderful to be driving again. In shakedown mode.<o:p></o:p></p>
<p class="MsoNormal">’74 spitsix – there is a light forming at the end of the tunnel, a light where the engine and rear diff may talk to each other again
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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