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Are you reading GV's hype or have you actually used
one,Devin? The reason I ask is a few people that own them say their gear
splitter function doesn't quite work as slick as GV says,,that their main
benefit is reducing the final drive ratio.
If your road use only consists of a 35 mile jaunt
to the strip once in awhile,I think I would save the money and leave the car
alone.
Just my opinion,though.
----- Original Message -----
The trick to the GV unit is that 1st over is
almost identical to close ratio 2nd gear. This allows you to hit first
over when you would normall grab second, without having to clutch or move the
shifter. Then go to 2nd over at the nest shif, then 3rd over, never
actually shifting into 4th, although the ratio in 3rd over is almost
1:1.
While the 4.56s are deep for an ordianry BB,
mine's happiest between 4500-7500 rpm. If I went to the TKO I could put
3.55s back in and still have the same total gear ratio I currently do in first
with the 2.20 geared Muncie. As it is, I'm only going through the lights
at about 6000, where I'd like to be closer to 7000.
Devin
----- Original Message -----
Sent: Monday, May 29, 2006 11:33
AM
Subject: Re: [Chevelle-list] overdrive
thoughts
4.56 cogs are a lot of gear of a big
block,unless you're running 1/8" mile. If you run a Gear Vendors unit,the
weak link is still the Muncie trans. Not sure how one would allow a
clutchless 1-2 shift,though. Herb is more familiar with the GV od unit so
maybe he will add his input.
A Tremec TKO-600 would be strong enough but
have heard they don't really like to be powershifted at 6500+ rpm. The
shifter position probably wouldn't be a problem and very little tunnel work
would be required,if any. Cost would be a wash,too. You wouldn't need a 4.56
cog with their ratios,either.
----- Original Message -----
To all- I'm debating between 2
possibilities for an overdrive in my 64 and would like some feedback and
experiences. I'm running a 454 that is on the ragged edge of
street-ability, Muncie M21 and a 12 bolt with 4.56 gears. My primary
use is dragracing, but I drive to and from the strip, 35 miles each
way. I'm running nearly 4000 rpm on the freeway to do 65. My
thoughts are between a Tremec TKO 5 speed or a Gear Vendors
overdrive. The Gear Vendors unit has an advantage in that it allows
full-throttle upshifts, making the 1-2 shift clutchless, but leaving me
with a trans that is way underrated. I expect that someday I'll end
up scattering it. The Tremec is much stronger, but I've never seen
one installed and really don't want to move my shifter position, not to
mention I don't know how well they shift at speed. Anybody running
either of these options out there?
Devin
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