main drive gear broke,'96 FLTCUI

Discussion in 'Transmission' started by rodburner, Nov 6, 2010.

  1. rodburner

    rodburner Member

    the threads broke off the gear and were in the sprocket nut ,anyone ever have this happen ? What would cause this ?
  2. Jack Klarich

    Jack Klarich Guest

    Heat treat not right on some of the trannys, early 5 speeds had problems with clutch hub and tranny shafts breaking, also the sprockets would some times shear the locks, The MOCO came out with an upgrade for Big Twins as well as the Sportster line, I have repaired a number of the Sporsters in my time, JMO from what I have seen and worked on, I bet Chopper has a view on this, Capital Jack