u/Master-Of-none8

I am trying to save my rear differential if I can. I am hoping that a fluid swap and cleaning of the vent will help buy some time.
The fluid that comes up is AcDelco 88862624 but when I look for it in Canada I am being told I need manual Transmission fluid/crack gear 88862625.
Both are Gl 5 75w90 but I want to make sure this information is correct.
It’s for an ATS AWD.