Remove the idler gear shaft when removing the mainshaft bearing and the idler gear shaft bearing.

NOTE: If you are only removing the countershaft bearing, the idler gear shaft does not need to be removed.

To remove the mainshaft bearing, the secondary shaft bearing, and the countershaft bearing from the transmission housing, expand each snap ring using snap ring pliers, then drive the bearing out using the 15 x 135L driver handle and the 78 x 80 mm bearing driver attachment.

NOTE: Do not remove the snap ring unless it's necessary to clean the grooves in the transmission housing.