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tcc solenoid stuck on

4K views 1 reply 2 participants last post by  M@ven 
#1 ·
Hi...I have a 2000 impala 3.4, and I had a code showing p0742 tcc solenoid circuit stuck on. So I swapped old solenoid with new one refilled fluid and drove it for a few miles. Same symptoms hard jerk when driving around 35 mph and code is still present. I was wondering if anyone can help with diagnosed of wiring to TCM and harness, I wonder if there is a way to test without taking transmission down again. Thanks for reading.
 
#2 ·
742doesnt indicate a TCC solenoid failure. It indicates that a fluid pressure switch in the trans is not disengaging when the torque converter is commanded off. It usually relates to a hard failure in the trans, like a sticking valve or fluctuating fluid pressures. Or a failed fluid pressure switch assembly.
 
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