B&M 40227 TRANSPAK - Manual (Page 12)

occur and an average pressure reading will have to be
determined. If the adjusting screw does not have
enough adjustment range to bring TV pressure within
specification, adjust rod at the transmission.
4.7Remove gauge block, allowing TV lever to return to
idle. With engine still idling in NEUTRAL, TV pressure
must be less than 34 kPa (5 psi). If not, back-out
adjusting screw until TV pressure is less than 34 kPa
(5 psi). Install gauge block and check that TV pressure
is not below 207 kPa (30 psi).
Manual-Locking type cable Throttle Valve (TV)
Control Cable System.
3.8 L (Thunderbird/Cougar) Engines
The throttle valve (TV) control cable system consists
of a cable attaching stud on the throttle body throttle lever,
the TV control cable assembly, the external TV control
lever on the transmission, and the cable mounting brack-
ets at the throttle body and transmission. (See Figs. 11 &
12.)
On 3.8 L EFI Thunderbird/Cougar vehicles, there is
also a bellcrank assembly mounted on the transmission
bell housing in the area of the TV lever and bracketry
holding the cable in the upper bell housing area (same as
5.0 L Thunderbird/Cougar vehicles with column shift).
As the throttle is moved from idle to wide open throttle
(WOT), the TV control cable pulls the transmission TV
control lever from idle to WOT. Return of the cable and
transmission lever toward idle is accomplished by the
return spring on the transmission end of the cable assem-
bly. This spring and the end of the cable assembly is
protected by a flexible rubber boot. The transmission
external TV control lever actuates the internal TV control
mechanism which regulates the TV control pressure. The
travel of this lever is controlled by stops internal to the
transmission.
The TV control cable is set and locked to its proper
length during initial assembly by pushing down on the
locking lever at the throttle body end of the cable assem-
bly. When the lever is unlocked, the cable is released for
adjustment. The take-up spring at this end of the cable
automatically tensions the cable when released. With the
slack taken up and the locking lever pushed, the take-up
spring plays no part in the operation of the system.
Under normal circumstances, it should not be neces-
sary to alter or readjust the initial setting of the TV control
cable. Situations requiring readjustment of the TV control
cable include maintenance involving the removal and/or
replacement of the throttle body, transmission, TV cable
assembly or installing a new main control assembly.
Readjustment of the TV control cable would also be
necessary to correct complaints of poor transmission shift
quality that would have been caused by a misadjustment
of the TV control cable.
When the TV control cable is properly set, the trans-
mission TV control lever will be at its internal idle stop
(lever to rear as far as it will travel) when the throttle lever
is at its idle stop.
12
Figure 11
NOTE: The following pressure check must be made with
the engine idling at normal curb idle in NEUTRAL,
parking brake set and with no accessory load on
engine. Do not make pressure check in PARK.
4.6With engine idling in NEUTRAL, insert gauge block or
drill shank between the carburetor throttle lever and
adjust screw on the transmission linkage lever. The TV
pressure should be between 207 and 276 kPa (30 and
40 psi). For best transmission function, use the adjust-
ing screw to set the pressure as close as possible to
227 kPa (33 psi). Since the TV pressure goes up
approximately 14 kPa (2 psi) when the shift lever is
moved from NEUTRAL to a forward gear, this will
result in a TV pressure setting near the desirable 241
kPa (35 psi in forward gear. Do not attempt to set TV
pressure with the transmission in gear. Turning the
screw in will raise the pressure 10.3 kPa (1.5 psi) per
turn. Backing-out the screw will lower the pressure. If
equipped with idle speed control, some “hunting” may
Figure 12