adding fluid to rear diff
 

Hi, is there a way to add fluid to the rear diff of my automatic svx while it is still in the car or does it have to be taken out first?

Nope, just jack up the rear end, remove the upper plug with a 1/2 square drive and add fluid. Remove lower plug to swap fluid all together. I'd recomend Royal Purple 75-90 Gear Oil.

The manual recommends to keep the car level when draining.