Andy_w83 Posted February 20, 2013 Share Posted February 20, 2013 Hi I am after some advice would an overdrive j type gearbox fit my 1976 spitfire that has a normal 4 speed in at the moment. Thanks Quote Link to comment Share on other sites More sharing options...
bodders1 Posted February 20, 2013 Share Posted February 20, 2013 You will need to change the propshaft for an overdrive one (they are slightly shorter).You will also need to change the rear gearbox mounting (and mounting plate) since these are a different pattern on the OD cars.Finally. you will need to get hold of an OD gearstick and wiring.Hope this helps Quote Link to comment Share on other sites More sharing options...
Andy_w83 Posted February 20, 2013 Author Share Posted February 20, 2013 Yes that helps I take it non of those parts are to hard to source or to expensive? I would be in no rush to get it fitted so could wait for the parts to come up at a reasonable price. Thanks for your help. Andy Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted February 20, 2013 Share Posted February 20, 2013 1500HL Dolomite uses the same gearbox in OD form. Only the gear lever is different. Not that there are that many about these days.....Nick Quote Link to comment Share on other sites More sharing options...
Andy_w83 Posted February 20, 2013 Author Share Posted February 20, 2013 Thanks Nick Quote Link to comment Share on other sites More sharing options...
Richard B Posted February 20, 2013 Share Posted February 20, 2013 Canleys sell new Spitfire 1500 O/D gearsticks. Quote Link to comment Share on other sites More sharing options...
Howard81 Posted February 21, 2013 Share Posted February 21, 2013 Nick_Jones wrote:1500HL Dolomite uses the same gearbox in OD form. Only the gear lever is different. Not that there are that many about these days.....NickAbout 100 1500HL's currently on the road and the same on SORN.. not all of those O/D!! Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted February 21, 2013 Share Posted February 21, 2013 Just out of interest, anyone know the part number for the mounting plate for a J-Type overdrive on a a single rail box?Is it TKC1407 O/D MOUNTING PLATE - SPIT 1500 ? http://www.canleyclassics.com/?xhtml=xhtml/diagram/spitfire1500overdrivemountingdetails.html&xsl=diagram.xsl&xhtmlcatalogue=xhtml/catalogue/spitfire1500.html&category=engine Quote Link to comment Share on other sites More sharing options...
Freebird Posted February 21, 2013 Share Posted February 21, 2013 bodders1 wrote:You will also need to change the rear gearbox mounting ..................Can you use the old gearbox with an adaptor then? I thought it had to be a specific OD gearbox - or is that just the 3 rail? Quote Link to comment Share on other sites More sharing options...
Richard B Posted February 21, 2013 Share Posted February 21, 2013 No either type of gearbox can be converted with the correct adapter and mainshaft. Quote Link to comment Share on other sites More sharing options...
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