Explaining
The Gate Shift Kit, cont'd Page 2 of
3 wwAs
you may be aware, there are three fore-and-aft shift planes
in the 915 shift housing: 1st/2nd, 3rd/4th and 5th/Rev. The
goal is to create some sort of device that provides some
resistance when shifting into 1st/2nd. This feedback alerts
your nervous system what gear you are currently going into.
Beyond that, here were my design criteria: -
Simple -
Form follows function. Straight-forward design means less
overdesign, added cost and chance for a
malfunction. -
High quality
- Materials have to be sturdy, corrosion resistant and long
lasting -
Appearance -
It must look purposeful and nice without chrome, even hidden
under a gear shift boot or under the engine (e.g.
HeetSheet). -
DIY -
Installation with ordinary hand tools; 2-3 hours
max. -
Even better
than the competition wwAfter
many hours sketching design options (many of which were some
form of elaborate linkage system attached to the top of the
shift plate and pretty impressive BTW), I finally came to
the same conclusion as the competition's design. That is, to
"cop" (borrow) Porsche's design of a spring-loaded pivot pin
they use to define 5th/Rev. gears. It's the most simple and
straightforward method. However, it does take some added
parts to make it fool-proof. If you haven't looked inside
your shift housing yet, there are a couple of coil springs
the shift lever compresses to shift into 5th and reverse.
The springs provide tactile feedback you are venturing into
another shift lane. On the other hand, the factory mechanism
leaves 1st through 4th gears undefined, not spring-loaded,
waiting for a missed shift. This is a potential problem
area, especially in the heat of battle when you're hunting
for a particular gear and select the wrong one - oops. And
as mentioned previously, the distance from shift housing to
transaxle reduces much mechanical feedback one normally gets
with a shifter mounted directly onto the
transmission/transaxle. wwThe
Gate Shift kit spring loads the 1st and 2nd gear positions
in much the same way as 5th and reverse. Thus, we now have
defined gates surrounding 3rd and 4th gears. It is now much
easier to feel (without looking or guessing) what gear one
is in. When shifting between 3rd and 4th, the spring
mechanism on either "side" keeps the shift lever in this
shifting plane. You must consciously make the effort to
shift out of the 3rd/4th gear shift mode. Likewise, the
3rd-to-4th and 4th-to-3rd shift is now unconscious as this
is now the default shift path. When shifting into 1st (not
too often at speed) or 2nd (fairly common), just like the
shift to 5th, you must move the shift lever against spring
pressure (to the left) and into the desired gear. When
upshifting from 2nd into 3rd gear, spring tension directs
the shift lever into the 3rd/4th gear path; no more
inadvertant shifts into 1st (unless you want to). Page 2 of
3 © 2002,
Sherwood Lee All Rights Reserved

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