Borg-Warner T-18 4-speed
Borg Warner T18
(shown without extension housing) |
Borg Warner T19
(shown without extension housing) |
Another
Granny-Gear transmission. These transmissions were installed in many 1965-1985 Ford pickups
(as
well as Jeeps and IH Scouts) as a successor to the T98. Ford used three
different versions of this transmission, which is equipped with a 28-spline output
shaft. Both the case and top cover are cast iron, with the top cover
being secured with 6 bolts. First gear and reverse are not synchronized.
It's replacement, the T-19, was used in '74-'88 Ford pickups and some IH
trucks and is identical in appearance except has a 5.11:1 first gear
ratio which is synchronized.
The T18 &
T19 has a 1-1/16" diameter, ten-spline input shaft that has a stickout
of 6-1/2" from the front face of the transmission. The pilot tip of the
transmission measures .668". The front bearing retainer flange measures
4.850" and the bearing retainer tube is 1.432" in diameter. The front
bolt pattern is the symmetrical Ford "butterfly" pattern; 8-1/2" wide by
6-5/16" tall. The input shaft length is 6-1/2". Checking these
dimensions will verify that the transmission is a 1966 or newer model,
precluding it from being the T98. The transmission can also be
identified by its casting numbers cast into the driver's side of the
case. T18s have casting number "13-01" and T19s have casting number
"13-09". Case length is 11.875". Unlike the NP435, the PTO port is
on the driver's side.
From 1966
until 1978, many T18s used a T98 shifter assembly. 1979-newer T18s used
a three-fork shift cover assembly that shifts reverse gear directly.
Because of this, reverse location is on the opposite side of neutral
than the earlier version (‘66 to ‘78). Earlier versions reverse gears
shifts over and up - later versions shift over and down.
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