I'm 100% positive that the custom made replacements won't have that weakening groove... since I found there is another (easy) way to hold it all in place.
Will post details asap...
G.
Gerhard,
I cannot recall the purpose of that groove. Was it for a shaft retaining screw to ride in?
I have replaced a shaft that sheared at the groove and left me looking silly with the handle in my hand....... hardly what I expected given the burly nature of the truck.
What are you designing? An external retainer plate?
Rick
Sorry Rick, don't know how I missed your post...?
Better than any long explanation just take a look at the pics....
It looks as if the stock shaft was intentionally designed to twist/shear at the groove, maybe kind of a pre-engineered revenge for when brutal force was applied at the wrong place............... who knows???
If I could even call this an upgrade.... it really is as simple as can be: forget the stock set screw & groove. To keep the new shaft from being pulled OUT by the force of the detent ball and spring inside the handle an additional sleeve is fit as a spacer in between housing and fork. Washer is optional and may help to adjust for correct lenght, little over 3-3/8" in this case. On the other side of the fork a short coil spring keeps the shaft from moving IN to far. Which could happen when you had the handle off to service the external parts.
The only trick to consider when making a new shaft is that the keyways are NOT 180º opposed as one would assume; they need to be off by about 5º , so that the handle stays within range of detents. There is not too much tolerance left to either end of travel for the fork & clutch collar, between given detent positions.
If anyone wants more details PM me.
G.