99 S10 4wd front diff oil

[doberman]

Hi,

Is the oil for the front differential of a '99 S10 4 WD the same as the rear diff?

The rear diff is normal - (rear wheels spin opposite directions if off the ground?)

Are there any additives required?

Thanks

[OverBoardProject]

Your best bet is look into the owners manual. If you don't have it request that someone with the same year scan the nessary pages, and e-mail them to you.

I've got Posi on my Blazer, and to be perfectly honest I don't know if both wheels turn the same way while I spin them. I understand that's old school and that newer rear ends act just like an open dif until 1 wheel spins faster than the other.
Chevy will tell you what you have in the rear end based on the serial number