A simple fix for this low speed shudder problem which should have been first call for Toyota. Forget about $2895 job to change torque converter. Trans specialist in Adelaide city Centre suggested I approve a trans flush and filters and add "Shudder Fix" which has no detrimental effect on the hydraulics within the valve body. I noticed a distinct difference immediately. Give it a couple of weeks to work properly through and the problem completely disappeared. It has now been 8000Kms since the flush etc and no sign of shudder whatsoever. Cost $550. Don't believe the lie that auto trans. are sealed for life. Bad, ignorant and costly advice from Toyota service centre in my view.