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.

 

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

The sum of the teeth on each pair of gears should be the same. 46 in this case.

Thank you, not ron and trapezeartist, I will get on with rebuild. What's the best oil to run these gearbox on please.