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Light Throttle Surging and Noise

JasonAVGuy
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JasonAVGuy Enthusiast

JasonAVGuy

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Hello all, I am having a bit of trouble with my truck when under light throttle. Between 1000-1700rpm when driving with no load my 5.3L starts to surge about 50rpm with a increase in felt power when it happens. I am also hearing a vibration or light grinding sound. From my reading I’m thinking this could be a torque converter issue maybe the shift solenoid. When the truck is in tow mode I don’t notice the issue but if I leave grade braking on when the truck downshifts it does not feel normal or what I’m used to when I tow. It’s somewhat harsher. Thank you all for your time I sure appreciate everyone. 
 

 

Update: I just noticed when I go between Drive and Reverse it’s takes it a second to move then it jumps a little. Checked trans fluid looks good. 

Edited by JasonAVGuy
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