Transmission Problem with my 1998 Pontiac Grand Prix GT
3.8L
check engine light
GM Computer codes = torque converter switch stuck on
tip/donation yes
GM tech = JK
question = where is the torque converter switch? and can I fix this at home?
JK:
Did you have any other codes along with the P0742?
VISITOR:
No other codes.
JK:
OK.
This is most likely the solenoid TCC solenoid is bad. Possibly the harness at the solenoid as well.
Have also have a few problems in the valve body that the solenoid valve goes into.
This is not something that can really be done in your garage. You will need a lift and several
special tools.
The solenoids and valve body are located inside the side cover of the transmission.
The cover is accessed through the drivers side wheel well.
The engine / transmission assembly needs to be supported with adjustable fixtures, the left side of
the frame needs to be lowered after removing several items, while supporting the engine / trans
assembly.
Then the engine / trans assembly would be lowered out of the bottom of the car far enough to get
the cover off. Sometimes easier to remove the frame completely. Once the cover is off, the
solenoids and harness can be removed. Expect to pay approx. 5 hr. labor at a repair shop.
I will send a couple of pictures in a few minutes of the TCC valve location as viewed with the cover
removed.
3.8L
check engine light
GM Computer codes = torque converter switch stuck on
tip/donation yes
GM tech = JK
question = where is the torque converter switch? and can I fix this at home?
JK:
Did you have any other codes along with the P0742?
VISITOR:
No other codes.
JK:
OK.
This is most likely the solenoid TCC solenoid is bad. Possibly the harness at the solenoid as well.
Have also have a few problems in the valve body that the solenoid valve goes into.
This is not something that can really be done in your garage. You will need a lift and several
special tools.
The solenoids and valve body are located inside the side cover of the transmission.
The cover is accessed through the drivers side wheel well.
The engine / transmission assembly needs to be supported with adjustable fixtures, the left side of
the frame needs to be lowered after removing several items, while supporting the engine / trans
assembly.
Then the engine / trans assembly would be lowered out of the bottom of the car far enough to get
the cover off. Sometimes easier to remove the frame completely. Once the cover is off, the
solenoids and harness can be removed. Expect to pay approx. 5 hr. labor at a repair shop.
I will send a couple of pictures in a few minutes of the TCC valve location as viewed with the cover
removed.
