Hey all, I just wanted to get people opinions on what I should use for differential gear oil.

I used Lucas 80-90 and I have noticed any problems at all. I was thinking about doing the same on the front axle but was also considering 80-90 full synthetic. Thoughts?

 

That is what I use. Full synthetics is good to use.

 

I use Lucas oil stabilizer. The bottle said you can use it 100% in differentials, so I tried it and I've never heard the differential make a noise since! It works great.