Well, I spoke with a buddy of mine today...he's into rock crawing, drag
racing, and does a LOT of fabricating...he's got
all kinds of stuff laying around his shop... Almost as a second thought,
I asked him if he had any manual tranny's laying
around...he said he had a Rockcrusher there, that was in a 4wd, so it
needed a tailhousing, and it needs a correct
bellhousing, as it's got a Ford one on it now... I asked him how much,
and he said how about 'FREE'... I told him
the price was right! He thought the wide ratio wouldn't be that great
for a muscle car, but they're very common
in muscle cars. I'm not sure of any details, as I haven't seen it yet,
but I think I should be good to go...
Need to find a bellhousing and tailshaft, but that should be relatively
easy.
Any preferences as far as clutches go?
Thanks!
Ron
Dale wrote:
If you go with a relatively inexpensive Muncie and plan to do (i.e., not
racing as such), a M20 offers a better street ratio from 1st to 3rd. I
think the Muncie will hold up quite well to 400+ HP. If you're looking to
make 450-500 HP (honest flywheel horsepower), you're not building a cruiser
anyway, IMO.
Below are the ratios of the M20 & M21/M22.
M20 63/65 2.56/1.91/1.48/1.00~reverse 3.16
M20 66> 2.52/1.88/1.48/1.00~reverse 3.11
M21/M22 2.20/1.64/1.28/1.00~reverse 2.27
All three trans are within .5% ratio drops between 1st & 2nd (from 25.39 to
25.45)) and 2nd & 3rd (from 21.95 to 22.51). It's only the 3rd to 4th drop
that the M21/M22 (close ratio) has about a 10% advantage (21.88 to
32.43/31.51). But, the lower 1st, 2nd, and 3rd gears of the M20 (wide
ratio) will allow you run a bit higher rear end gear giving you better
cruising RPMs. See my table at
http://www.chevellestuff.com/generic/muncie.htm for a list of these
percentage drops.
Naturally, if you can spring for a Tremec type 5-speed, 5th gear is O/D
which will help cruising as well but the drop ratio is huge, 39.35 from 1st
to 2nd, 32.32 from 2nd to 3rd, and 25.37 from 3rd to 4th according to the
last gear numbers I have. Of course the 32% drop in O/D is nice.
Dale McIntosh
67 El Camino
1967 Chevelle Reference CD now available!
ACES #1709/TC Gold #92
-----Original Message-----
Ron wrote:
Hi guys... I'm REALLY wanting to convert my '68 to a stick...
I'm NOT restoring, but AM on a budget. Car is mainly going to be a
cruiser. I don't expect to ever have more than 450-500HP.
I'm wanting advice on whether to go with an old style 4-speed,
or a new style trans. A Tremec would be nice, but WAY pricey...
What do you guys recommend??
Thanks!
