Waldo Posted April 26, 2019 Report Share Posted April 26, 2019 Hi, need to rebuild a GB47 gearbox with the pinions given to me, I am not sure about the sequence could someone please help. Is this the right sequence. mainshaft from clutch end. 30t-20t-26t-17t layshaft 16t-25t-21t-29t thanks. Quote Link to comment Share on other sites More sharing options...
not ron Posted April 26, 2019 Report Share Posted April 26, 2019 I am not aware of this specific gearbox and without seeing the parts but based on simple gearbox design rules I would expect the two options to be ( dependant on which goes together based on internal diameters and splines) 30/26/21/17 16/20/25/29 or 30/25/20/17 16/21/26/29 Quote Link to comment Share on other sites More sharing options...
trapezeartist Posted April 26, 2019 Report Share Posted April 26, 2019 The sum of the teeth on each pair of gears should be the same. 46 in this case. Quote Link to comment Share on other sites More sharing options...
Waldo Posted April 27, 2019 Author Report Share Posted April 27, 2019 Thank you, not ron and trapezeartist, I will get on with rebuild. What's the best oil to run these gearbox on please. Quote Link to comment Share on other sites More sharing options...
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