Use a slide hammer with a self tapping screw on the end, punch a small hole in the seal and screw the self tapper in, a couple of tugs on the slide hammer will pop it out, you may have to do it a few places if it's tight but should be fine.
Then clean the shaft and push a new one in, take the old one to a bearing supplier for a cheaper part than oem.
If you get a seal with a spring inside you can often pull the spring out and take a few coils off and pop it back in to make it a bit tighter.
1 hour at the most, engine out my arse!