Just found my glove box sticker and window sticker, which both say I have anti-spin. Which I payed an extra $285 for when ordering.

Does this mean I have a Trac-Rite differential, aka a Limited Slip diff?

Are both the 9 1/4 front and 11 1/2 rear diffs Trac-Rite?

Does this Trac-Rite diff require 'limited slip additive' in the gear oil? From what Ive read only the Trac-Lok diff requires additive.

My dealer has been putting LS additive in the oil. Should I make him replace it before it does damage?

Any advice and experiences welcome.

Joe