The Ford Toploader Transmission was introduced in 1964 to replace the Borg
Warner T-10. This is the super-tough transmission built by Ford
Engineers to stand up to just about anything demanded from it.
of the Toploader are assembled through the top of the case
instead of through a side cover, thus the name "Toploader." This
design is actually stronger than a 4-speed box with a side
cover. The shifter rails are mounted in bosses that
are cast into the box itself, leaving the only function for
the top cover to keep the lube inside.
4-speed transmission is of the fully synchronized type with
all gears except the reverse sliding gear being in constant
mesh. All forward-speed changes are accomplished with
synchronizer sleeves instead of sliding gears. The
synchronizers will enable quicker shifts, greatly reduce
gear clash, and permit down-shifting into any forward-speed
gear while the car is moving. All forward-speed gears
in the transmission are the helical-type; however, the reverse
sliding gear and the exterior of the first and second-speed
synchronizer sleeve are spur-type gears.
was used in production from 1964 to 1973 in almost every
model Ford car and a few foreign cars.
A 1-1/16" input
shaft was used in motors from the 200 c.i. to the 390 c.i.
while the 427, 428 and 429 were available only with close
ratio gears. The 1-1/16" input transmissions are
available in both close and wide gear ratios.
The gear box was
built in 3 case lengths. The 1964-65 Fairlane, T.V.R.,
Griffith, and Sunbeam Tiger case is 25-1/2" long. The
AC Cobra with 427 and 428, all Mustangs, Falcons, Mavericks,
Cougars, 1966-67 Fairlanes and Comets use 24 " transmissions,
while all full size cars and the 428, 429 Cyclone and Torino
use the 27" box. The 1964 Toploader used a small
4 hole maincase with the small O.D. bearing retainer. All
1965-73 cases were wide 8 hole cases with the large O.D.
In 1964 and early
1965 a few transmissions used a 25 spline output shaft which
proved to be defective. These were quickly dropped
from production. Normally all motors 200 c.i. to 390
c.i. use the 28 spline output shaft. All 427, 428 and
429 motors use the 31 spline output shaft. There
are a few exceptions to the above information. The
toploader was produced in 133 different models.