poopsie, any LHS should have this stuff,, diff lube comes in different weights from like 1000 to 300,000, the higher the number the thicker the oil, used in diffs only, I think. The gears in the tranny and such I lube with a light brushing with moly grease, I use an old small paint brush with the brissels cut to about 1/4" long and just dab some grease on the gears. Don`t use much as it will just fly off the gears. I used 50K in my diffs cause thats what I had on hand.Joe