Torque Converter Clutch / PCM Solenoid - what does what

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steelnewfie

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Sorry. PWM Solenoid. I have the 50-55mph shudder. I have ruled out Universal joint on my 06EB but it fixed some wonky vibrations. Tightening plugs fixed my (everyone thinks it's a normal Ford 'tick' sound especially in drivethroughs). TIGHTEN YOUR PLUGS PROPERLY BEFORE CHANGING COILS. Change plugs asap. Removing/replacing catalytic converters fixed a whole BUNCH of things (175K miles). My fuel economy went up 80 miles per tank!! Incredible difference, also do this ASAP as my flow percentage had been restricted by I estimate 90 percent and it accentuated ALL the other problems. She's perfect in every gear, every RPM; tons of power great fuel economy... But I still have that f-king shudder when overdrive is deciding if it wants to drop down or out.. I was just going to buy the clutch solenoid but as I read more, it could, feasibly be the PWM. So she shifts PERFECT, except from the overdrive to fourth/third. Shifts perfect INTO overdrive. Any idea which solenoid controls the shift OUT of overdrive? Thanks!! Love this Triton the more I fix it. It's going in my 2003 Mustang GT when its 4.6 explodes.
 
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steelnewfie

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The article did not give me any indication on whether to replace the Torque converter PWM solenoid or the Torque converter clutch solenoid. Anyone?
 
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