kart649 Posted July 28, 2008 Share Posted July 28, 2008 Intend to fit an overdrive gearbox (J type) to my herald ('65 12/50) which will have a mk3 spitfire engine fitted. Have found a company who can supply a recon box and the complete recon overdrive unit. Which gearbox do I need? Three rail or single rail? Which donor car do these come from? Better off with a D type? Which propshaft? Any help greatfully received. Link to comment Share on other sites More sharing options...
Clive Posted July 28, 2008 Share Posted July 28, 2008 3 rail j typrs are VERY rare, only fitted to some late MK4 spitfires. A d type 3 rail (4 synchro from a mkIV, but the 3 syncho earlier ones work fine too) and the propshaft from a non od vitesse. You may need to alter flanges on the prop to suit the box and diff.You can fit a single rail J type box, but needs a dolly 1300 clutch plate as it has fine splines, and a special propshaft.Any conversion will need the appropriate monting plate, rubber mount, angle drive, longer speedo cable AND a switch, either gearknob one (tend to be unrelable with wires breaking IME) or the early spit/vitesse column switch. Choices choices......Clive Link to comment Share on other sites More sharing options...
kart649 Posted July 29, 2008 Author Share Posted July 29, 2008 Thanks for the help. As you say choices, choices Link to comment Share on other sites More sharing options...
.thumb.jpeg.b15b81ef10abeea1c3039ae03c4a9f3a.jpeg)
Recommended Posts
Archived
This topic is now archived and is closed to further replies.