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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 86silver on February 14, 2014, 11:47:28 pm
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On the highway, at 60-70 mph cruising, when I come to a point that I have to slow down,,,a machine gun vibration starts...can feel it in the whole truck and it's not a slight vibration either. So then if I shift it out of overdrive it runs fine, no slow down vibration.
Stopped at a red light, light turns green, truck won't move...just makes noise, let off gas and shift out of OD....able to move again.
Thoughts?
Also, Could this be why my truck has been so lethargic for over a year and can't seem to get out of its own way....much less anything else on the road???
GM 290hp 350, 4.10 axles, 1406 Edelbrock carb, 700R4 tranny.
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It sounds like the torque converter solenoid isn't allowing the converter to unlock. look into the solenoid itself or possibly the valve the solenoid acts upon is getting stuck.