Good deal Larry. Should help quite a bit. I'm surprised others have not chimed in as well, as there are quite a few here using them I think.
Jim, if yours is harder to shift in the winter, it might be time for a lube-rotation.;D
Did you do the last one, and know what's in there now? If not, then it's time no matter what.
If it's either very old oil, or very thick, you can use thinner gear lubes and improve your shifting all year round. Many run 90w, and a few even run thicker up to 140w gear lube. And that's just too thick for most of us. Heck, those old 435's will run on ATF if you want to!
I like the thinner 75w/90 synthetics myself. Should do your trans good if that's not what's in there now.
If it's old enough too, just any new lube oil can make a difference in how they feel and shift.
Paul