Just Curious-How often are you suppose to change the rear diff fliud? i got 45,000 on my car and i was wondering if changing the fluid would be neccesary. I was also wondering if any the gear fluids come with the limited slip additive?
Thanks

 

recommended every 30,000 miles by manufacture...

Some syn fluids say you dont need to add, but I just stick with dino oil and add limited slip additive...

Most companies, like easton or aurborn recommend dino oil...