Not sure what's causing this...maybe someone else has experienced this and found the culprit? Basically, there is a studder in my trans (4L60E) during part throttle acceleration, in 2nd gear only... it happens between 2000-2500rpms every time. It studders only for a split second and then continues to shift later into 3rd, 4th as normal as I accelerate. I've pointed this out to my tuner but he never sees it on any of the data logs. Has anyone experienced this and what was the culprit in your trans?

Stroker2112