I guess that's what it's called. It's the splined shaft that the shift levers connect to. The splines for the heel lever have somehow managed to allow the shifter to slip. I don't get that.

Anyway, to replace it, would the inner and outer primary have to come off, or does it come apart in some way?

 

Check out the www.betterlever.com..
They have a u-tube video also.. Tenn.Vol.

 

Try moving it in or out just a bit on the shaft to see if you can get it to grip better. I had to trim the rubber bushing between the housing and shift lever so I could move them both in on the shaft and took care of the problem. Also it's probably the lever splines that are worn and not the shaft.

 

I just had this problem with the shifter falling when driving and thought it was the shifter shaft. Turned out all it was to fix it was to remove the shifter and clean the shaft and reinstall. good luck.

 

The splined shaft is a hard steel. The lever is a softer material and designed to be the one that wears out, not the splined shaft.

 

Depends on what RC scale the material was heat treated to.
Could still be soft compared to other hardened materials.

 

You don't have to remove the primary to remove the shaft...there's a bolt that holds the shifting rod on just like the shift levers. Loosen all three and you can pull out the shifter shaft.

 

I would have thought this to be the case, but I can feel where the splines are worn/pushed down in one area as compared to another.

Next boggle is how in the hell does the heel shift lever, which mates into these splines all around, slip partially around the shaft? Somehow, it appears to have done so.

 

You need to take the bolts all the way out (on the levers). loose won't cut it, because of the groove in the shaft. At least on my '09...

 

true bolts have to come all the way out; easy fix -- I just purchased the spline from HD i think it was $24.00