Now you'll be able to test to use the push gear. Pay attention thoroughly If you're able to hear any signs of sounds in the torque converter. In case the torque converter is faulty, it would build unforeseen pressures inside the torque converter, which can cause rough idling. Antique illustration https://garrettgkjik.blogolize.com/an-unbiased-view-of-torque-converter-clutch-73033936