[Mart]

I use a soft steel pin and then put a hose clamp over it in case it breaks. I actually put 3 hose clamps on 120 degrees out to maintain balance. My version of the safety clip Murre describes above.

I once used an Allen bolt (good grade steel) and self locking nut. That snapped and made an unholy racket. So now use the method I described above.

I make it sound like I do this all the time, that isn't so. The hose clamps are on my roadster. The coupe and pickup haven't been disturbed.

I think what is more important is that the splines on the shafts and coupler are a good tight fit without any slop. It's the play that fatigues the pins.

In a modified (shortened) setup the alignment is critical. Any misalignment will cause wear in the splines and subsequent pin failure.

That's a long answer to a short question.

Mart.