Replace pinion seals?

It will all depend on how they come apart. Some seals are unitized with the inner seal race. Meaning you drive the seal in and then install the yoke. The two piece seals where you replace the race on the yoke separate should be alright to remove and reinstall. If Its a unitized seal then more than likely it will come apart when you remove the yoke and need replacement.

 

If you can keep the seal together while pulling the yoke, it’ll probably be alright. I don’t know exactly what you looking at but usually there’s a deflector that will keep you from helping it separate from the yoke.