Oil for transfer case and rear final drive Im going to change the fluids in both the front diff (transfer case) and the rear diff (final drive).
I know Nissan international service manual recommend an 80w-90 GL5 oil for both front and rear, but here in Sweden many mechanics recommend for example Castrol 75w-140 limites slip GL5 oil for the rear final drive, (even Castrol recommend it)
My question now is can i use the Castrol 75w-140 LS oil for the transfer case too?
Castrols webbpage says 75w-90 for the transfer and 75w-140 ls for the rfd, but should there be any drawbacks or problems to use the 75w-140 LS GL5 in both??