Re: downshifting, double-clutching, etc

[dailojeff@juno.com]

I have to agree, with today's fully synchromeshing transmissions, it is
not *necessary* to double-clutch. However, matching revs still has it's
merits. For braking to a stop, I just use the brakes, unless it's a panic
stop and I want a little help from compression braking. IMHO it's easier
to replace brake pads than to do a clutch.

In any case, matching revs (either by heel & toe, or double-clutching)
results in less drivetrain stress and smoother decelleration. This is
even more important going into a corner. If you don't make a smooth
downshift, the difference in rpms could be enough to upset the car. Not
so much of an effect at normal speeds, but try that in the snow or on a
track and you could spin. 

The lower gears (3-2, 2-1) are more difficult to heel & toe than the
higher gears, since the ratios are farther apart than say the 5-4 or 4-3
shift. Learning the shift points in each gear will let you smooth out
those shifts and get you home if your hydraulic clutch ever goes.

And that comment about wear on the T.O. bearing? I think yes, riding the
clutch at a stop light causes... wait..lemme consult the Audi book of
worship... Ah! ok, action on the pushrod causes the release lever to push
against the pressure plate, which in turn places thrust against the throw
out bearing.

A well executed downshift is still a joy to behold, a poorly executed one
just spills the commuter mug. :)

/Jeff
80q