Nope, rear end and driveshaft are brand new. Have had zero issues with that. If I end up doing an air check and everything looks ok, it'll point to the sprag needed to be replaced correct?

**EDIT: Now that I think of it, it started doing it after my line lock decided not to work and I did a burnout just flooring it after the rear tires were wet. The car was on the rev limiter (6500) for maybe 4-5 seconds. This was in 2nd gear.