[oldman]

Great information. The TR6060 trans is awesome, but to make it stronger vs the 56 trans, the syncro packs are much smaller (allows bigger / wider gears), this double whammy means less syncro for bigger gears, so outside what is needed for say a road race, don't be down shifting this bad boy to slow down because:

A) that's what brakes are for
b) you are spinning up much bigger gears at much high RPM which is BAD for a limited syncro trans
c) it makes no sense to down shift to slow down from speed despite what you see on some movies, especially on the street.
d) if you are road racing and using rev match, just be a little gentler on the down shifts after hard braking into a tight turn, usually you have more time than you think before you need to put the power back on.... or get a Miata with the tinker toy trans and then you can downshift all you like

I live on the world's highest / larges volcano and sure I put it into lower gear for long declines, but this is at relatively low engine and transmission speeds.