C Countershaft Nut, Ring and Pinion Questions

TMatt

Member
On a C I'm having troubles getting the ring and pinion set right. My problem is, when I tighten down the countershaft nut, it pulls the pinion gear out too far to properly mesh with the bevel gear. I've taken all the shims out and it's still set out too far.

When I took it apart, the countershaft nut was barely finger tight. When I put the nut on like it was, the gear mesh looks real good, until I roll it the other direction and the whole countershaft moves about a 1/8th inch out of the case. The cast cover over the nut was cracked when I took it apart so I wonder if this is how it was before?

Could something be worn down causing this extra slack, or did I miss something?

Am I correct that adding shims behind the countershaft front bearing flange will move the pinion gear out farther from the ring gear?

Thank you
 
Have you checked the parts diagram to make sure all the parts are in there. The parts diagram shows a spacer on the countershaft between the back bearing and the 1st speed gear. If that spacer is missing I think you would have the problem you describe. Looking at the parts diagram, it looks like that spacer may be hidden inside the oiler gear. Anyway, a spacer there would push the pinion gear back.
 
Thanks for the reply.

Turns out there were two things causing my trouble. First, I found that the edge of the boss of 4th gear where it meets with the front bearing was badly worn.

Also I pulled out the spacer next to the rear bearing and found it had about an 1/8th inch groove worn in it too. I swapped these out and the pinion depth looks great.

Thanks again
 

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