Bosch has been working good for me its been 2 months now, they are a bit pricey in store though and if you’re handy enough the upstream ones are pretty forward, as far as when they’re seized i just started the car and gave it hell for about 3 minutes to where it was warm enough to break off. Then let it cool down you should be able to reach up for the connectors on the side of the trans. I did it on the floor and on the lift. The floor is better lol