Andy Fl Posted October 12, 2008 Share Posted October 12, 2008 Following an earlier thread which I posted about a Vitesse overdrive gearbox ( please see http://club.triumph.org.uk/cgi-bin/forum10/Blah.pl/Blah.pl?m-1212354882/s-0/#num0) I am wondering if anyone can help me to identify if this is actually a three synchro gearbox or a four. (Sorry about the state of the photo ...it is a bit blurred) Link to comment Share on other sites More sharing options...
Nick Jones Posted October 12, 2008 Share Posted October 12, 2008 Looks like 3 synchro to me.Nick Link to comment Share on other sites More sharing options...
Andy Fl Posted October 14, 2008 Author Share Posted October 14, 2008 Thanks Nick. (and thanks for your responses in the earlier thread too). I suppose my dilemna now is that my car is currently running a non-overdrive four synchro box and I don't really want to lose the facility of having synchro on first gear. Is it possible to take the innards out of the four synchro box and rebuild the three synchro overdrive box, or is that asking for trouble? Link to comment Share on other sites More sharing options...
Nick Jones Posted October 14, 2008 Share Posted October 14, 2008 Erm.... dunno! Not tried that combination. I don't think so. You may be able to use your 4 synchro as a base, add a 4 synchro OD type mainshaft and use the adaptor plate and OD from the 3 synchro. I'd strongly suggest checking with someone who really knows the answer first though! Dave Pearson or Mick Papworth would be 2 candiates that spring to mind though there are others.....4 synchro box also a fair bit stronger than the Vitesse 6 one I believe, although not exactly bullet proof....CheersNick Link to comment Share on other sites More sharing options...
herald948 Posted October 15, 2008 Share Posted October 15, 2008 I seem to recall reading somewhere that there is about a 1/2" difference in length between the cases of a 3-synchro and a 4-synchro, with the latter being the longer case? Link to comment Share on other sites More sharing options...
ferny Posted October 15, 2008 Share Posted October 15, 2008 On my Herald 1st gear is hardly needed. The only time I've wanted to grab 1st quickly is in an autotest and when I've got an idiot in front of me in a multi-story carpark. Other than that it's 2nd all the way. Link to comment Share on other sites More sharing options...
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