When I do that job on my Ford truck I use the product Ford recommends, which I bought at a Ford dealership. There’s more than one friction modifier, and they don’t all have the same specs. Suggest you use the exact product Dodge recommends (by Dodge part number or name/band/etc) and then you can just use the amount suggested in the owner’s manual. Aftermarket friction modifiers might work just as well, but unless you have a reason to use an aftermarket version, best to stick with the one and amount that Dodge recommends.
If it hasn’t been overly long since the last time the job was done, you might be able to just pump it out with a transfer pump, rather than taking the cover off. When I take the cover off I smear a little gasket sealer on both sides as I recall. It’s a little bit awkward of a job. One of the posters here recommended a spray on product for flimsy gaskets like that.