VLSD min oil requirement
 

Hello everyone! Being a base owner with blown diff bushings and wanting to not one wheel peel anymore, I recently purchased a vlsd off a g37 owner and installed it with whiteline bushings this past weekend. My concern is that when I swapped out the old fluid for new Mobil 75w-90, I completely emptied out the diff by tilting it and then I added the 2 quarts. I then later read a thread this morning where the actual capacity of the diff is 2.25 quarts. Am I screwed? I'm only asking because I feel some tension when in lower speeds and in reverse. Maybe it's because I'm not used to two wheels spinning and bushings that keep the diff in place? Lol Also, if I need more fluid can I just top it off with the same oil or should I just change it up with redline? Thanks in advance :tiphat:

By change it up I mean drain and fill redline, not top off with redline lol

Just top it off. It's not very much, you should be fine

Will do. You think the "tension" is from the lower amount of oil or is it just me not being used to the lsd and the solidity of the bushings?

Is this

Flushing and refilling the differentials on our cars is pretty easy. After flushing all the gear oil out of your differential when you refill it you only fill it to the top where it is filled up almost to the very top. If you put your finger in the fill hole you should have Gear oil on the end of your finger then you know your differential is full of Gear oil. I don't recommend overfilling these differentials with Gear oil where it is begins spewing out of the fill hole. Normally two quarts of gear oil will fill the differential. I recommend you use synthetic gear oil that meets or exceeds the API GL-5 specification no matter if you are using 80W90 or 75W90 gear oil. Depending on if your 370Z is used under normal or severe conditions will depend how often you flush and refill your differential gear oil. I helped someone do there first differential flush and refill at 18K miles on their 370Z and the gear oil looked very dark like the properties in the gear oil were really broken down. He opted to use Royal Purple 75W90 synthetic gear oil for the differential service and it worked out well.