see if you can watch tcc slip speed command vs tcc slip speed actual. when it slips over 130-150 when being commanded 0 tcc slip thats probably when you start feeling the shudder. if you can command full tcc lockup while its shuddering and it goes away the tcc is just worn and glazed over. the trans fluid will also have a distinct scent.


also you need to make sure to perform the crank variation learn after engine replacement as well.