I have the T/A rear girdle for my 10 bolt (in my IROC) and I bought the two qts of Red Line Gear Oil and the GM additive. However, it does not seem as though the rear if filled up as far as it should (according to the directions with the cover). I just read that the cover holds an extra 1/2 qt of fluid. Is it ok to drive with just the 2 qts in the rear for a while until another bottle of fluid comes in? I was planning on going to the track on Wednesday...will it be ok??