Mark VIII Rear Differential Gear Oil?

[Fife]

Hey, I am preparing to change the gear oil in the rear differential on my 1994 Mark VIII. What is the recommended weight gear oil for this? Should I go with any particular brand or type?

Thanks,
Fife

 

[jamies98lsc]

i use 80w and whatever brand is cheap!

 

[driller]

FWIW, I use HydroTex MultiFilm 80W-140 HyDiamond Gear Oil with MT10 additive.

 

[Lux]

It calls for 75-140 full synthetic. I'm using lucas brand when i do the gear install (already purchase the fluid)