how can you guarantee a job when you are not replacing seals that would be disturbed on removal and refit
You never touch and seal.
You undo the three torque converter bolts, you lower the trans on the tranny jack,
The torque converter stays in the tranny so you don't disturb that seal.
Then you don't unbolt the flex plate so that seal never gets touched.
If they're leaking then yea call the customer and ask if they want to spend extra money to get the seals done.
This is one big issue when customers get multiple quotes, they might question why X quote is higher but never study the quote to see extra work is being performed.
Then you get the customers that say, why are you going to change that seal? But it's not leaking, so why would you change it.
It's just easier to do the job, inspect and find a reason to tell the customer "hey you need a seal"
You guys have to remember that 99% here are mechanically inclined people on this site, when you're dealing with people that don't know a thing about cars it's a whole different story.