Ok so Im wondering if theres something wrong with my center diff or its low on fluid or something. The center of the car makes this like constant woosh sound or shhhh sound once i get above like 5-10 mph (however it never gets any louder).



Im wondering if it might just be low on fluid but im also wondering if its possible to top off the fluid or risk mixing two oils that wont work well together. Or if it might be something else... Thanks

 

bump

 

I can tell you the center differential takes 75W90 gear oil syn kind.

Im no help on the noise tho.