02yellowGT

When I first got the car it would spin both back tires but the last two times I have tired it has only spun one. It only has 17000 miles on her so I do not think the clutch packs are going bad yet. The dealer said they changed out all of the fluids when they checked the car out when it was traded in. I am wondering if they did not put any friction modifer back in. If i put some in do you think it will fix the problem?