I'm a bit surprised so many use Shockproof heavy in the transmission. I've run into that locally. It always seemed a little viscous for a motorcycle. Do you like it?
Why do you say that, just because they have "Heavy" in the name? If you check the actual viscosity, it's the same as the other gear oils recommended for a Harley trans. They make a claim that it protects like a 250 weight or some such drivel, but that's not the real measured viscosity.
I've been using it for many years, before it became the latest big thing in the forums and at the dealerships as a matter of fact, and I've had no reason to switch. Works fine, nice red/pink color, smells terrible, tastes like crap. Good for tracing leaks.

Jerry