cordex80 Posted July 31, 2013 Report Share Posted July 31, 2013 whether original 4speed gearbox can be modified to 5speed? without having to replace the original gearbox Quote Link to comment Share on other sites More sharing options...
B.L.Z.BUB Posted July 31, 2013 Report Share Posted July 31, 2013 (edited) You need to swap in a K50 box. Edited July 31, 2013 by B.L.Z.BUB Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted July 31, 2013 Report Share Posted July 31, 2013 You need to swap in a K50 box. because the 5th gear is outside the gearbox in the tailshaft housing, and the idler gear shaft has to be longer to go through the rear wall and carry it. They are different in the belhousing front plate that carries the thrust bearing too, now I think about it. Just swap them, as Reed said- Quote Link to comment Share on other sites More sharing options...
T4R4S Posted August 2, 2013 Report Share Posted August 2, 2013 I'm looking at doing the same swap (k40 to k50 box)thing tell me if it works, is there a link with directions I have the Gregory's but pics help too Quote Link to comment Share on other sites More sharing options...
5ARJ Posted July 10, 2014 Report Share Posted July 10, 2014 Can 7k gearbox direct fit to 4k engines Quote Link to comment Share on other sites More sharing options...
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