If your transmission is
>wining on acceleration, it has either a scorched bearing, or a scorched
>gear, or many of both.

A worn differential may also whine under load.

My 095 trans suffered a collapsed mainshaft bearing; this did not quite
make what you'd call a whine, but made a lower-pitched moan.

Regarding teflon (PTFE), this is a plastic which has the lowest coefficient
of friction known to man, I believe, and is also extremely resistant to
heat (witness its use in Dupont coatings on nonstick frypans etc). But it
is not all that hard, a bit like nylon. Surely, when minute particles of
teflon are introduced to restricted spaces and squeezed between metal
surfaces at high pressures (eg within bearings, between piston and cylinder
wall etc), some of this material would be rubbed into the surface
irregularities in the metal? This SHOULD produce something of an incomplete
and very slippery coating, though this wouls eventually wear away. Whether
such a coating would be capable of giving a measurable, much less
noticable, improvement in performance or fuel-efficiency is doubtful. But I
cannot see how it should be able to cause harm (though I'm no expert here).

Andrew