Originally Posted by Sydewynder

Looking at the pics in the manual and which gear meshes with which, I get

52/24*39/19 = 4.44736......... The 32t is actually the spur that meshes with the motor pinion so I didn't use that to find the internal ratio.

Different pitch gear doesn't affect the ratio calculation. Only the number of teeth do.

HTH

Oh guess I took too long looking at the manual. Lol