If the engine and gearbox have been removed as I think you said
the drive shafts would have been removed and in that instance both
n/s & o/s seals should be changed as they can get damaged when
removing the shafts also on replacing the drive shafts new roll pins and
siliconed when replacing. This from a Renault Alpine timed served mechanics who has see my Vid of the Car , Lee Crowston , you removed them , why did you not do the job right and what i Payed for ,
https://youtu.be/hbGd6T2pJws?t=9,,https ... Gd6T2pJws,,
No new seals replaced after 30 years in my Car ,Just but the Drive shaft back in to the old seals in to my Car No new Drive shaft seals but in , all so Petrol leeking , steering Bushes , had Gone after 30 years ,
![RATS :RATS](./images/smilies/RATS.gif)