Firebird V6-173 2.8L VIN L 2-bbl HP (1983)
Fluid Pressure Sensor/Switch: Technical Service Bulletins
Oil Pressure Switch - Information
Number 83-I-168
Section 7
Date 12/83
Subject:
OIL PRESSURE SWITCH INFORMATION - THM 700-R4 TRANSMISSION
Figure 1 - Control Valve Assembly
The THM 700-R4 transmission has four oil pressure switch locations in the control valve assembly (see Figure 1)..
Depending on vehicle type, various oil pressure switches will be used in these locations. When no switch is used, a 1/8 inch NPT pipe plug (Part
Number 44612) is installed in place of the switch.
On vehicles built without an electronic control module (ECM) these switches control the torque converter clutch operation and exhaust gas recirculation
(E.G.R.) bleed system. On ECM equipped vehicles these switches help supply information to the ECM about the transmission operation. The ECM also
controls various functions including fuel mixture, engine timing, engine idle, and torque converter clutch (T.C.C.) operation. If switches are wrong,
mislocated, or malfunction, various electrical and mechanical problems may result, i.e., blown fuses, instrument panel lights remaining on without
apparent reason, or improper engine operation.
