Extreme Dodge down here in Jackson still does. $8.99 for a 4 oz bottle. I'd bet your local dealer does as well.
I would change out the gear oil and add a bottle of it. Hopefully the unit isn't damaged.
People sometimes get confused on the friction modifier as they think it makes the suregrip act tighter, when in fact it loosens the friction on the clutches for normal driving, to keep them from prematurely wearing out.
