Going to put oil in my 12 bolt it has eaton posi. Ihave 2 bottles of 76 85-140 gear lube
http://tds.econocophillips.com/catalogs/76%20Lubricants/Gear/76%20MP%20Gear%20Lube%20TDS.pdf

Is this good oil? and is it mineral? Also have a bottle of gm additive.

Marcus

Looks good, its mineral oil. Make sure you use the GM additive.

Dave