In most cases a trans flush…
In most cases a trans flush is the worst thing you can do. Better to drop the ( replace with one equipped with a drain) drain & replace the filter. Do this 3 times to get all the fluid out of the torque converter. When you flush. Any contaminates are pushed into all the tiny passages, into the lines and cooler as well as the torque converter. That being said I wish the U.S. vehicle manufacturers. Would bring back manual trans options. I've never experienced a manual Trans failure EVER!!! But every auto trans I've ever owned has failed sooner or later.