by Jon Mikelonis
Introduction
The aftermarket has made it easy for classic Mustang owners
when it comes to 5-speed auto-to-manual conversions. On the
other hand, ask the owner of those larger classic Fords (think
Galaxie and Torino) about options beyond the three speed automatic
and the list of possible solutions becomes very short. The
first thought that comes to mind for any Ford enthusiast wishing
to attempt an auto-to-manual conversion on a non-Mustang is
how to obtain the original equipment (OE) parts that are a
direct fit for their chassis.
Unfortunately, the OE route for an auto-to-manual
conversion means trying to locate extremely rare pedal assemblies
and mechanical clutch linkage that ultimately leave you with
a vintage transmission and a relatively outdated pedal feel.
The barriers along the OE route are raised even higher when
the enthusiast faces the extreme prices for these used and
near obsolete parts. Driven up by the overall market value
of well-restored American musclecars, factory musclecar parts
like "Top Loader" transmissions and manual clutch/brake
assemblies are no longer reasonable options for the do-it-yourselfer
on a budget.
Taking on an auto-to-manual conversion
today means making due with parts that are readily available
new from the aftermarket or in abundant supply in used form.
These conversions inherently include a fair amount of risk
depending on what kind of Ford you are working on. In this
article I will take you through the steps of installing a
Borg Warner T5 into a 1972 Ford Gran Torino originally equipped
with a floor shifted small block C6. Although the possibilities
and the operation has been discussed often within FordMuscle's
own forums, the FordMuscle staff has not seen the project
documented nor have we seen a finished conversion. This article
makes no promises as to final outcome due to its pioneering
nature. However, at the time of completing Part One (Mockup)
of the conversion the vehicle is proving to accommodate the
T5 quite well.
Preparation
If you have been around FordMuscle long enough then you know
I own a
couple Gran Torino's. These cars have been around the site
for at least
ten years and have been the subject of many upgrades. For
at least 5 years I have considered a manual conversion in
my 351C/C6 car. With my ongoing 400 build at the machine shop,
my renewed patience as a 37 year old father, and a little
more confidence in the garage, I have finally
embarked on the conversion. Here's how I got started.
It's pretty rare that I get help in the garage (or the
sideyard for that matter). So, when my brother was
visiting one weekend in 2007, he lent a welcome hand in
pulling the 351C
and C6 out of my Torino. |
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There it is and there it goes, the heavy and bulky small
block C6.
These transmissions are still desirable to many but I
was happy to see it exit my Torino for the final time. |
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Finally, I moved the Torino
from the sideyard and into the garage where it belongs.
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For the sake of snapping great pictures for you guys when
it's time for creating a pedal assembly, I removed the
dash to clear the way. Plus, my dash was falling apart
so I knew this would be a way to guarantee a junkyard
replacement. |
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Long ago, when I was about 19, my brother and I converted
this column shift car to a factory floor shifter. That
work would come in handy here since there was already
a hole cut out of the floor and I had sourced the shifter
cover (the brick colored piece) in 1990. |
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That's right, I chose a T5 for a couple of reasons which
I'll discuss in
the section below. I grabbed it off craigslist locally
for $200 and a FordMuscle T-shirt. Although this T5 is
the"World Class" variety the tranny is only
rated to 265 ft lbs. Regardless, it would do for a trial
fit. |
Why
We Chose the T5
Your concerns and my concerns about
using a T5 behind a Ford 400 should be heightened by the fact
that when I bought the transmission, the seller single-handedly
picked the tranny out of his truck bed and put it in the back
of my Ford Freestyle. I almost embarrassed myself by asking
the seller if he needed help. I learned quickly that these
units are lightweight!
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Borg Warner T5
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Even
the strongest factory Borg Warner T5 is only rated to 330
ft lbs of
torque. By the numbers, bolting a stock T5 behind a mild performance
351M/400 is just asking for trouble. There are enough stories
on the web that testify to the destruction of T5's behind
moderately built Cleveland motors. Conversely, there are an
equal amount of car owners who claim T5's have been tenacious
and reliable behind their Cleveland powered Fords.
Considering the added torque potential a Ford 400, why then
did I opt for the T5 over the stronger Tremec TKO? Unfortunately,
even used TKO transmissions are running $1000 on classified
boards and I won't even discuss the price of a new TKO. Compared
to the $200 I spent on my used T5, $1000 was simply too much
to fork over for an auto-to-manual conversion that offered
no guarantees with regard to clearance and fit. In this case,
consider me your guinea pig. If I explode the T5 then you
can tell me "I told you so". Soon after that, I'll
have it rebuilt to the specifications outlined in the FordMuscle
article... Swing
Shift. Since my 400 build will probably come in right
around 450hp and 400 ft lbs, the T5 in stock form will be
an interesting experiment to say the least.
Bellhousing
and T5 Adapter
Performing an auto-to-manual conversion
from scratch meant that my garage wasn't full of the usual
useful parts leftover from a drivetrain disassembly. As a
result, I summoned the aftermarket to find a bellhousing to
accommodate my 400's big block "bellhousing-to-block"
bolt pattern and the T5's unique and offset "bellhousing-to-transmission"
bolt pattern. Since stock T5's are not normally placed behind
big blocks (or "mid" blocks with big block bolt
patterns), I figured there was no one-piece off-the-shelf
solution for connecting a T5 to a 400. This meant I needed
to rally to make it work.
For the bellhousing I turned to Lakewood
and ordered their
351M/400/429/460 to Top Loader/T10safety
bellhousing also known as a scattershield. See sidebar for
more information. Obviously, the
"bellhousing-to-block" bolt pattern was a perfect
match. However, an
adapter was required to enable the T5 to bolt to the other
side of the
bellhousing. California
Pony Cars' T5 Spacer Adapter Plate (pictured at right)
which is designed for 1965-1970 Mustang T5 conversions on
OE bellhousings, suited this application just perfectly. In
addition to being an "adapter" this part also serves
as a "spacer" that accommodates the 1985-1993 T5's
input shaft length. The spacer/adapter requires some machining
so I took my situation down to Augie Steinert at Superior
Machine in my home town of Sparks, NV. Incidentally, Superior
Machine is the same shop that is handling my 400 build.
Out of the box, I expected the spacer/adapter to bolt
straight to the "bellhousing-to-transmission"
bolt pattern in the Lakewood bellhousing. This was not
the case, for some reason the spacer/adapter requires
the customer (or the customer's machinist) to mark and
drill two holes into the bellhousing. According to the
instructions, one of the two holes is also meant to be
tapped. |
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In stock applications, the spacer/adapter is intended
to be attached with three "socket flathead"
screws from the outside of the bellhousing and one "hex
head" bolt and nut from the inside of the bellhousing.
Since I had an all-steel bellhousing that would accommodate
welding, I went a different route as you will see on the
following pages. |
(Bellhousing
and Spacer/Adapter continued, Dropping in the Assembly)
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