Replace rear end gear oil the other day. Really low and no leaks detected. Only purged about 16 oz. of old gear oil and installed 1.25 liters of Valvoline 75-140 limited slip. It was pretty easy. I used a hand purge to remove old oil and with a 3' piece of 3/8s tubing was able to refill from outside by the rear wheel. Worked great. I have done this several times onZ28 and GTO.

 

Curious why you didn't use Ford 75w-140? About the same price and spec'd for our cars. Didn't really need the limited slip type since the 07-09 has a craptastic open diff.

 

I luv that technical term!

 

Thats enough for me! No leaks and low is pretty sad. I've been wanting to get to that... But I will be using synthetic. Out of interest how many miles on your car?

 

I missed about using the ford gear oil. The auto parts store looked up what type and it said GL5. I was not sure if it was limited slip and read somewhere it was ok to use limited slip. Seems to work fine and no problems.

 

The Valvoline I used was full synthetic.