Question about Buick Century
TCC stuck open in a 4T60E can be either the TCC solenoid gone bad,or the actual TCC valve and bore in the valvebody is worn out.I rebuild transmissions for a living,and i have a reamer for the TCC bore that oversizes the bore,and then install an aftermarket oversized valve to restore hydraulic integrity.What happens is,the valve is PWM (pulse width modulated) which means it basically vibrates in the bore,and strokes many many times per second.Well,all this pulsing wears out the bore,so it must be oversized.But when the bore becomes worn out,sometimes the valve will literally get stuck and won't move.
Posted on Jul 25, 2008
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Posted on Jan 02, 2017
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